Alternatives to ISnotSPAM

Compare ISnotSPAM alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to ISnotSPAM in 2026. Compare features, ratings, user reviews, pricing, and more from ISnotSPAM competitors and alternatives in order to make an informed decision for your business.

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    InboxAlly

    InboxAlly

    InboxAlly

    We engage with your emails to teach inbox providers not to send your emails to spam. Our clients have seen their open rates more than DOUBLE within 1-2 weeks! Highly engaged recipients not only open emails, but scroll down as they read. So long as the content is longer than the page, this should be done for nearly all opened emails. When a recipient goes out of their way to take an email out of spam, they are telling the inbox provider, hey, you made a mistake. Moving an email from the promotions folder to the primary inbox tells inbox providers that you disagree with their sorting criteria and it and similar emails should go to the primary inbox. Demonstrates that recipient is interested in the content of your email. We have a set of random generic replies we use for this. Marking an email as important can essentially be interpreted by the inbox provider as "This email is extremely valuable, never send it to spam."
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    SpamTitan

    SpamTitan

    TitanHQ

    SpamTitan email security is an email spam filter for businesses, smbs, MSPs, and schools. SpamTitan email security blocks spam as well as phishing and day-zero attacks, viruses, malware, ransomware, and other email threats. Helps control mail flow, clean it, and protect against unwanted email. We provide easy-to-use yet advanced email security for businesses, smbs and MSPs that are Office365 friendly. SpamTitan - Premium functionality included: • CEO Impersonation protection • Phishing/ Spear phishing protection • Link analysis • Full Sandboxing • Zero Day Attacks protection • Mail Spooling • Spoofing protection • Malware and Ransomware protection • SPF/DKIM/DMARC checking • Encryption • Fully multitenant environment • Ability to rebrand the entire UI • Full REST API: • Comprehensive support and set up docs Try a FREE, fully supported trial of SpamTitan Email Security today.
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    Starting Price: $2.14/user/month
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    Folderly

    Folderly

    Folderly

    AI-based email deliverability platform for monitoring, spam testing, and maintaining your email deliverability by solving any spam issues. Our goal is to help marketers accelerate their sales by assisting them in sending emails that drive revenue. Over 51% of all business emails worldwide never reach the inbox. Losing your emails to spam folders ultimately leads to budgeting issues and missed sales opportunities. Folderly makes sure that you're never in that 51%. Avoid blacklists, bypass spam filters, and see your messages delivered to your email recipients’ inboxes. We designed Foldely from the ground up to help companies receive returns on their marketing dollars. Whether you're looking to increase the email deliverability of your emails across multiple email addresses, or want to prevent any spam-related problems before they occur - Folderly is a great starting point to make sure your messages are reaching your recipients' inboxes.
    Starting Price: $160 per month
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    mail-tester

    mail-tester

    mail-tester

    We needed a cheap, simple and efficient way to quickly test the quality of our own newsletters. We simply built on our own tool. Now we're sharing it for free via our web-interface and enable you to include our tests in your own app and whitelist our service by creating an account. We're geeky email software engineers. We generate a random email address each time you access our port. You should send a message from your favorite Newsletter/email software to this email address. Once done, click on the check your score button and as soon as we receive your message, our snail will stop to give you your spam score. Mail-tester will analyze your message, your mail server, your sending IP and show you a detailed report of what's configured properly and what's not. All spam filters work differently. What may pass in mail-tester, might not in your own office inbox. It also depends on user preferences.
    Starting Price: €50 per 500 test
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    CleanTalk

    CleanTalk

    CleanTalk

    CleanTalk is a cloud-based anti-spam protection service and suite of plugins that keeps websites free of spam by analyzing visitor behaviour and form submissions in real time and blocking spambots before they post comments, create fake registrations, submit contact forms, place fake orders, or send spam messages, all without requiring CAPTCHAs, puzzles, or user challenges that interrupt the visitor experience. It centralizes anti-spam detection across popular CMS platforms like WordPress, Joomla, Drupal, and custom sites by using proprietary algorithms and a growing database of spam-active IP addresses, emails, and domains to identify and filter out unwanted content while allowing legitimate user interactions to pass; administrators can view and manage logs, private block lists, and spam statistics from a dashboard. Additional features include a SpamFireWall that prevents bot traffic from reaching the site, real-time email validation to block fake or disposable addresses.
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    SpamAssassin

    SpamAssassin

    Apache Software Foundation

    Welcome to the home page for the open-source Apache SpamAssassin Project. Apache SpamAssassin is the #1 Open Source anti-spam platform giving system administrators a filter to classify email and block spam (unsolicited bulk email). It uses a robust scoring framework and plug-ins to integrate a wide range of advanced heuristic and statistical analysis tests on email headers and body text including text analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases. Looking for tips to improve your existing installation? Click here for a variety of topics in our Wiki that might help. SpamAssassin uses a wide variety of local and network tests to identify spam signatures. This makes it harder for spammers to identify one aspect which they can craft their messages to work around.
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    Hornetsecurity Spam Filtering and Malware Protection
    Hornetsecurity’s Email Spam Filter and Malware Protection Service offers the highest detection rates on the market, with 99.9% guaranteed spam detection and 99.99% virus detection. Our Spam Filtering Service effectively protects mail servers against DDoS attacks and phishing emails. Our multi-layered spam filtering service blocks the majority of spam emails as they arrive—keeping the quarantine clear and easy to manage. With proven features and thorough spam filtering mechanisms, your inbox remains free of annoying spam emails. The abbreviation DDoS stands for Distributed Denial Of Service. A DDoS attack is a type of DoS attack in which multiple hijacked systems are used to overload system resources or network bandwidths. This makes websites and online services unreachable. For companies, this often means large financial losses due to delivery bottlenecks, for example, and major damage to their image from the perspective of customers.
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    SpamCop

    SpamCop

    Cisco

    SpamCop is the premier service for reporting spam. SpamCop determines the origin of unwanted email and reports it to the relevant Internet service providers. By reporting spam, you have a positive impact on the problem. Reporting unsolicited email also helps feed spam filtering systems, including, but not limited to, SpamCop's own service. The SpamCop Blocking List (SCBL) lists IP addresses which have transmitted reported email to SpamCop users. SpamCop, service providers and individual users then use the SCBL to block and filter unwanted email. The SCBL is a fast and automatic list of sites sending reported mail, fueled by a number of sources, including automated reports and SpamCop user submissions. The SCBL is time-based, resulting in quick and automatic delisting of these sites when reports stop.
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    SpamHero

    SpamHero

    iSparks

    Sender behaviors are tracked in real-time. The sender's reputation is weighed during the filtering process. Using spam traps around the world we are able to detect new spam attacks as they occur and adapt to them instantly. Never miss an important email. All spam is stored in a searchable quarantine. The process usually takes less than 5 minutes to get set up! In fact, you don’t even have to tell SpamHero what email addresses on your domain are valid. During your trial period, SpamHero will auto-learn what email addresses on your domain are valid. Unlike other spam filtering systems that rely on fancy algorithms that spammers can easily defeat, SpamHero's rule-based system features million of rules that are constantly updated and maintained by live superheroes and robots 24/7. Like other spam filtering solutions, we use popular virus scanners to help block viruses.
    Starting Price: $5 per month
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    Clyton

    Clyton

    Gammadyne Corporation

    Clyton is an email client with advanced security and spam filtering features. The spam filter is highly configurable and supports DNS blacklist checking (DNSBL). Expect 85% of spam to be eliminated with the default configuration. Email that is suspicious but not obviously spam is quarantined for 24 hours and then retested, providing the blacklist enough time to react to new spam sources. The built-in address book supports personalized mass-mailings. Received email cannot run scripts, download multimedia, or use embedded objects without your approval. Other features include encrypted storage, whitelisting, powerful HTML editor, attachment viewer, message drag and drop, custom message templates, SSL encryption, USB flash drive installation, and much more.
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    Bot Butcher

    Bot Butcher

    Bot Butcher

    Bot Butcher is an API designed to help developers stop contact form spam bots on websites by automatically classifying incoming messages using artificial intelligence. When a visitor or automated system submits a message through a website’s contact form, the message can be sent to the Bot Butcher API along with contextual information such as the domain. It uses a fine-tuned large language model to analyze the content and determine whether the message is spam or legitimate within the context of the website’s topic. The API then returns a JSON response indicating the classification, allowing developers to automatically block spam or pass valid messages to the intended recipient or CRM system. This enables websites to filter unwanted bot traffic before it reaches inboxes, significantly reducing the amount of spam that site owners must handle.
    Starting Price: $1.99 per month
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    PerfectMail Antispam
    PerfectMail delivers better than 99% filter accuracy with false positives (wanted e-mail blocked as spam) at less than 0.1%. PerfectMail automatically learns about your users and their regular e-mail peers and never blocks their e-mail. The only time PerfectMail might have an issue is with a questionable e-mail from new senders. This takes the risk out of antispam filtering. Most spam filters work like this: receive e-mail, queue, filter, deliver or send a non-delivery reply. The problem with this model is that mail is delayed and senders/recipients may never realize that wanted messages were blocked. PerfectMail works in real-time meaning that it filters messages as they are received - without queuing. This means that PerfectMail tells the sender if their message is being blocked. - PerfectMail's antispam engine is programmed C - the fastest programming language in the world.
    Starting Price: $499 one-time payment
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    WP Mail SMTP

    WP Mail SMTP

    WP Mail SMTP

    If you're having issues with WordPress not sending emails, you're not alone. With the rise of aggressive spam filtering, it's tough to reach the inbox unless your emails are configured correctly. Once you've switched from the default WordPress email settings over to WP Mail SMTP, your email deliverability issues will be solved for good. Are you missing out on leads and sales because emails sent from your WordPress site are ending up in the spam folder? Missing out on these opportunities can be a big hit to your bottom line. When your emails are properly authenticated using SMTP, they'll be recognized as legitimate and bypass those aggressive spam filters. WP Mail SMTP integrates with all of the best secure SMTP providers. No matter how many emails you need to send, you can connect with the right provider for your business needs and budget.
    Starting Price: $49 per year
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    G-Lock EasyMail7

    G-Lock EasyMail7

    G-Lock Software

    Easy Installation. Send Your First Email in Minutes. G-Lock EasyMail7 is supplied with a rich collection of HTML email templates that you can install and use for your newsletters on the fly! Improve your deliverability by scanning your emails through all the major spam filters before you send. Receive a spam score as well as actionable tips for improving your delivery rates for every email send. No need to rely on a third-party to store your mailing lists and messages. G-Lock EasyMail7 stores your email list and messages locally – on your own machines, keeping your data safe and secure.
    Starting Price: $259 per year
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    PerfectMail

    PerfectMail

    XPMsoftware

    PerfectMail™ is a simple, accurate, easy to deploy, and easy to use solution for spam and virus filtering. It acts as an independent e-mail firewall for your Mail Server. PerfectMail™ protects your e-mail server from spam, virus, spoofing, phishing and spyware attacks. It leverages proprietary advanced e-mail filtering techniques. PerfectMail™ is completely new! Its fast, real-time anti-spam engine and advanced spam filtering strategies were built from first principles in our lab to be the fastest, most effective. Highly efficient code provides extremely fast performance. Industry leading 99.9+% accuracy, and almost no false positives.
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    SendForensics

    SendForensics

    SendForensics

    On average, 30% of emails fail to reach their target by dropping straight into customers' spam folders. Reclaim this lost revenue with the most advanced email deliverability system available. The SendForensics Deliverability Score is a unique, predictive modeling of an email's ability to reach any given inbox. To put it simply, it is a measure of an email's 'quality' in terms of how it will be perceived by global filtering-systems/ISPs and even human recipients themselves. Truly the Missing Metric. From email content, to the sending infrastructure, reputation, engagement-history, external feeds (such as Microsoft SNDS*) and more, SendForensics EDS automatically sifts through the datasets to present the biggest cause(s) for concern at every analysis.
    Starting Price: $49 per user per month
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    Spam Marshall

    Spam Marshall

    ITA Networks

    Spam Marshall has kept Exchange servers spam-free since 2003, as hundreds of small and medium-sized businesses throughout the world have come to rely on Spam Marshall as their first line of defense in keeping corporate inboxes clean. Spam Marshall's proprietary Customs Rules Engine Technology (CuRE) is a leading-edge tool that prevents spam from infiltrating Exchange Servers on multiple fronts: SpamMarshall features include Real-time monitoring, Usage of content filters, Grey Listing, Anti Phishing, SPF Check, PTR Check, Incoming emails rate control, Domain type checks, Domain age check to name a few. Spa Marshall provides administrators with all the tools to customize filtering options. Spam Marshall is scalable, flexible and affordable and takes a few minutes to install. Licenses begin at only $749, and it runs seamlessly on Exchange 2000, 2003, 2007 and 2010 or any other SMTP Server. It is supported on Windows 2000, 2003, and 2008 and is available in both x386 and 64bit versions.
    Starting Price: $749 one-time payment
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    SpamBully

    SpamBully

    SpamBully

    Intelligently knows which emails you've received are good and which are spam by using artificial intelligence and server blacklists. Everytime you download your email, SpamBully will make sure good emails make it to your Inbox. Decide who and what makes it into your Inbox. Choose which email addresses, words & phrases, countries, languages, and IP's are allowed or blocked from your Inbox. SpamBully always makes sure people in your address book make it to your Inbox. Get back at spammers by increasing their costs, returning their spam, and reporting them to the servers they came from and the FTC. Email a special password to an unfamiliar sender that they must correctly type in before their email is allowed to your Inbox. Checks Realtime Blackhole Lists for internet domains that are responsible for sending massive amounts of spam and automatically filters them from your Inbox.
    Starting Price: $29.95 per year
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    Spam Arrest

    Spam Arrest

    Spam Arrest

    Before using Spam Arrest, over 90% of our customers tried a spam filter on their inbox, yet spam still got through. Spam Arrest protects your mailbox from 100% of spam with a patented method for verifying relationships between you and your valued contacts, making email safe for everyone. Access your email using your favorite POP3/IMAP-compatible program (such as Outlook or Eudora), or from anywhere using our powerful webmail system. Get a new email address, as well as protect your existing mailboxes. Patented challenge, response technology blocks 100% of automated spam. Webmail allows you to access your email from any web browser, without having to install any additional software. SMTP is a standard protocol used for sending email. When you send email through the Spam Arrest SMTP server or webmail, the person you are sending email to is automatically added to your whitelist, so that they can reply to you without having to complete the verification process.
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    SpamCheckAI

    SpamCheckAI

    SpamCheckAI

    Built for SpamCheck-ing free form JSON, not emails like all the other spam APIs. Detect and block spam at the source with our extensive IP address analysis. Sophisticated analysis tools for detecting and assessing potential spam content. Validate and verify emails with our thorough multi-stage process. SpamCheckAI not only identifies and blocks spam but equips you with the comprehensive data needed to make informed decisions. Unleash the unparalleled power of SpamCheckAI’s URL Analysis, a revolutionary tool that digs deep to uncover hidden risks and elevates your platform’s integrity to new heights. Just pass the email and IP if you have them, then toss in any JSON object as the body. Whether you’ve got a handful of data or a whole heap, we’re all about flexibility. With SpamCheckAI, you’re in control, and spam doesn’t stand a chance. SpamCheckAI's API can analyze various content types including emails, IP addresses, and text content.
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    SpamStopsHere
    SpamStopsHere provides 24/7 spam filtering with zero-hour malware protection and almost no false positives without any user tuning or custom filtering. Setup is easy and there is almost no maintenance. Like our other hosted email services, it includes 24/7/365 live support via phone, chat or email. SpamStopsHere Professional and Enterprise Editions support multiple mail servers, and the ability to specify how you want us to distribute the load among them. Incoming mail is distributed evenly among your mail servers. For example, if you have 3 mail servers, roughly a third of your incoming mail will be sent to each server in an alternating fashion. SpamStopsHere will send emails to the first server in the list as long as it can receive mail, then to the next server in the list as long as it can receive mail, and so on. If Enabled, an email will be sent to your technical contact if our SpamStopsHere detects that your MX records are incorrect.
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    Send Individually

    Send Individually

    Sperry Software

    Need to send personalized mass emails in Outlook? Or send an email marketing campaign to many people but don’t want to put in the work of performing a Microsoft® Word Mail Merge or risk having your email being flagged as spam using a BCC? Then Send Individually is for you. It sends an email that you create to each of your recipients, one at a time. It performs a mail merge in three simple steps, right from your own email account. Individually addressing emails allows those emails to make it through more spam filters and raises response rates. Don’t you pay more attention to emails that are directly addressed to you? Now you can do it with ease. It’s perfect for sending out your newsletters, press releases, business announcements, or other marketing emails.
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    Verizon Call Filter
    Verizon Call Filter helps protect you from unwanted calls and lets you decide who can reach you. Call Filter detects spam and blocks high-risk spam calls by forwarding them to voicemail. Call Filter is for mobile phones and selects standalone smartwatches. Call Filter screens incoming callers to alert you if a number may be spam, a robocall, or fraud. If your device isn't compatible with the Call Filter app, you may still be able to use Call Filter through My Verizon. The Call Filter app is pre-loaded on most Android devices and may already be on your phone. Identify suspected spam calls with alerts. Automatically block spam based on their risk level and send them to voicemail (Call Filter automatically blocks high-risk callers). Report phone numbers as spam. Use filters to block other unwanted callers, such as robocalls. Adjust spam filter settings any time. Features such as Caller ID and blocking entire area codes give you even more control over incoming calls.
    Starting Price: $2.99 per month
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    EmailGuard

    EmailGuard

    EmailGuard

    ​EmailGuard is an all-in-one email deliverability platform designed to help you never land in the spam folder again. It offers a suite of tools to increase your email deliverability while ensuring compliance. With EmailGuard, you can instantly connect and monitor your domain's SPF, DKIM, and DMARC records, and if any records are missing, you can look up, generate, and verify them in one place. It provides features like blacklist monitoring to keep an eye on your domain, IP addresses, and sending servers, notifying you instantly if you're listed and providing details to get delisted. The features allow you to mask your primary domain with multiple secondary domains, using a pool of shared IPs or your own dedicated IP. EmailGuard also includes an email tester that analyzes 162 different potential data points, passing your email through a series of deliverability tests and spam filters.
    Starting Price: $49 per month
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    Warm Up Your Email

    Warm Up Your Email

    Warm Up Your Email

    Email clients like Gmail and Outlook have intelligent algorithms that know your email-sending history. If you blast emails with a new account or ever make a mistake, their algorithms put you in spam jail. Your only chance to leave spam jail is if somehow their algorithms learn that you're not spamming anymore. Warm Up Your Email receives your email and interacts positively to help you improve your sender reputation. Configure the daily send volume, as well as the subject and the body of your email, to start sending emails at your desired volume with your desired content. Your campaign will begin, and you’ll start seeing numbers in your dashboard showing how many were sent, opened, and replied to. Start analyzing the behavior of accounts hitting the spam folder with a 10-day spam pattern report that shows how using Warm Up Your Email affects your email deliverability and if you’re getting back to the inbox over time.
    Starting Price: $29 per month
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    EuropeanMX

    EuropeanMX

    Eunetic

    Protects your email communication from spam and viruses. EuropeanMX offers all-around spam protection as a cloud-hosted easy to set up "Software as a Service" solution, completely without expensive software installation on your servers or clients. Use our easy to set up SaaS solution as a reliable spam and malware filter. Our high-performance filter offers nearly 100% accuracy and virtually no false positives. Protect your IP ranges and prevent getting blacklisted. Automatically lock hijacked email accounts, block outgoing spam, and be informed about any suspicious activity. Continuously archive your emails to have a rotating backup at hand. Our archiving solution works in accordance with the current legal directives of the European Union. Strengthen the native security of Microsoft Office 365 or Microsoft Exchange with the sophisticated level of protection and scalability EuropeanMX offers.
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    Abusix Mail Intelligence
    Abusix Mail Intelligence is an innovative set of blocklists (RBL/DNSBL) that adds real-time threat data to your existing email protection. Considered as the first line of defense, blocklists help to prevent email-borne threats such as spam and malware from entering your network. We’re the first line of defense for your mail servers which allows you to save bandwidth and CPU caused by the more costly in-depth spam and virus analysis required for later content filtering. Abusix Mail Intelligence prevents outbound spam by helping you identify risky or compromised accounts by using our AuthBL. We also prevent outbound spam by providing additional data to your existing filters using our Domain, Short URL, Disk URL, Cryptocurrency Wallet, and Email blocklists.
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    World Voicemail

    World Voicemail

    Norwood Systems

    World Voicemail revolutionizes your voicemail experience, making it effortless to retrieve and respond to voicemails. You can read automatic transcripts of your voicemail. That's right - you don't even need to enter the App to see your latest voicemail. Cut through the noise and get rid of spam voicemails. Move a voicemail to the new Spam folder or mark caller as a spammer. Artificial intelligence also automatically detects and informs you of Suspected Spam. In the App, navigating your voicemails is now as easy as scrolling and tapping in an intuitive manner, and you can save you voicemails in threads, organized by sender. So you can boost your responsiveness by also sending voicemails to your assistant or team to respond on your behalf! Don't worry; you can filter out calls from personal contacts.
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    Akismet

    Akismet

    Automattic

    Akismet filters out your comment spam for you, so you can focus on more important things. We all hate spam. It’s annoying. It hurts your site’s credibility. Filtering it manually is confusing and time-consuming. Time spent dealing with spam is time stolen from the business of your site. Used by millions of websites, Akismet filters out hundreds of millions of spam comments from the Web every day. Add Akismet to your site so you don't have to worry about spam again. Sign up for an Akismet plan that best suits your needs. Use your API key to activate your Akismet plugin or module. Rest easy knowing that Akismet is protecting your site from spam. We want to keep spam off of the web and you can help us do it. Our affordably priced personal and business options allow us to provide free spam protection for over 7 million users.
    Starting Price: $5 per month per site
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    EmailListVerify

    EmailListVerify

    Email List Verify

    Full-Featured Email Verification. But half the price. Get rid of spam traps, hard bounces, disposable or catch-all emails without breaking your budget. Increase the sender reputation, deliverability & conversion rate of your emails by sending them only to real people. Stop spending money on spammy email addresses. Spend less by sending fewer emails thanks to the verified email list. Spam traps and hard bounces kill your reputation. Get rid of them so your emails don't end up in spam folders anymore.
    Starting Price: $4.00/one-time
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    Email on Acid
    Our three-step workflow fits into your existing production process, making it easy to save time, drive value, and connect with more subscribers. Deliver error-free emails with the push of a button—no HTML experience required! From UTM validation, and accessibility checks that ensure ADA compliance, to validating and replacing the first frame of animated GIF’s for Outlook, we offer customizable click-to-fix tools that fit your team’s specific requirements. Subscribers can’t engage with your campaigns if they don’t receive them. Improve your email deliverability—and land in more inboxes—with blocklist domain and spam tests. Check your email against 23 of the most popular spam filters and test your IP address against the most popular blocklist services. Resolve any deliverability issues before you click “send.” Every inbox displays emails differently. With previews on over 90+ clients and devices, we help you make certain your message displays as intended—in every inbox.
    Starting Price: $86 per month
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    Checkpoint Anti-Spam and Email Security

    Checkpoint Anti-Spam and Email Security

    Check Point Software Technologies

    Check Point Anti-Spam & Email Security provides comprehensive protection for messaging infrastructure. A multidimensional approach protects email infrastructure, provides highly accurate anti-spam coverage and defends organizations from a wide variety of virus and malware threats delivered within email. Comprehensive email security with 97% spam detection. Advanced anti-spam protection, including content-based and via IP reputation. Offers antivirus protection with both zero-hour and signature-based detection. Email IPS protection against Denial of Service (DoS), buffer over-flow attacks. Simplified configuration and management of mail security. Simple configuration with low management-overhead. Full user control with no user installation required. Real-time detection and updates provide immediate protection from outbreaks. Integrated into the Check Point Infinity Architecture. Activate Anti-spam and email security on any check point security gateway.
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    Warmy

    Warmy

    Warmy

    Warmy.io is a tool designed to enhance email deliverability by raising your email reputation to ensure your emails avoid the spam folder. The platform offers automated warm-up with the help of "Adeline", their AI engine. Users can connect their mailbox and let the system warm it up at an optimal pace, analyzing hundreds of parameters daily, interacting with real people on your behalf, and ensuring your emails reach the inbox. Additionally, emails sent through Warmy.io are automatically opened, marked as important, and taken out of the spam folder, boosting the sender's reputation. The platform provides a clear and transparent process, allowing users to stay informed and in control with tools like the Email Deliverability Checker, Email Health Checker, and Email Template Checker. The website showcases testimonials from satisfied customers and offers a 7-day trial without the need for a credit card.
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    Starting Price: $49 per mailbox per month
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    Emailable

    Emailable

    Coherent Path

    Email verification tailored for online marketing. Improve your open rates, reduce spam reporting, and get more sales. Sending campaigns to low quality or bounced emails lowers your brand's sender reputation. That causes more of your marketing emails to be delivered into spam. Fewer emails going to the inbox means less sales! Integrate Emailable directly into your business application to improve data quality. Verify addresses using our single and batch email verification APIs. Prevent fake, spam, and other bad emails from getting into your marketing lists with a simple javascript plugin. Ideal for your newsletter signup and anywhere email addresses are captured. No need for manual import and export; your email list data is synchronized automatically between your marketing tools. Undeliverable email addresses are instantly unsubscribed from further marketing activities and send events. With Emailable, your email lists are reverified every 30 days to catch inactive emails.
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    LeadSparrow

    LeadSparrow

    LeadSparrow

    LeadSparrow's drag & drop email designer enables you to build beautiful mobile-friendly emails in seconds. You do not need to start from scratch. Our email designer comes with pre-designed email templates to get you started quickly. Put your email in context. Personalize your email for higher conversion rate. With powerful merge tags, personalization is simply inserting the right tag at the right place in your email. Got more than one brilliant idea for your next marketing email. Run A/B Test to find out the winning formula. A/B Test your subject line, sender name or call-to-action for higher engagements. Say goodbye to "check your spam folder" reminders. With innovative Smart Spam Checker, your emails always hit the inbox. Make sure to run everything through spam checker for confirmed inbox delivery.
    Starting Price: $29 per month
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    The Very Good Email Company

    The Very Good Email Company

    The Very Good Email Company

    Your email in safe hands! The Very Good Email Company have built a range of services around its core email filtering services: filtering, hosting, groupware tools, archiving and fax to email solutions are available. Gateway: weapons-grade anti-virus and anti-spam filtering before it hits your, or your customers’ network! MailCore Pro: email hosting and office collaboration service: providing email, shared calendars, contacts, files and notes. Includes anti-virus and anti-spam filtering as standard. Zimbra: all the benefits of the Zimbra enterprise-class email, calendar and collaboration solution, with our spam and virus filtering as standard. Now with a huge 50GB of storage per mailbox! Messagebunker: a simple, secure, easy to set up and use in-the-cloud email archiving and discovery platform that won’t break the bank. FREE Trial!
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    Alias Email

    Alias Email

    Alias Email

    Alias Email is a privacy-focused email forwarding service. Create email aliases in one click - unique and anonymous email addresses that forward to your real inbox. Use them for newsletters, signing up on websites, or managing different roles in your work. Stay organized and secure without revealing your personal email! Alias Email is perfect for: - Privacy: keep your personal email invisible from third parties and data brokers; - Spam control: use a unique alias for every service. If spam arrives, you can disable this alias; - Inbox organization: route messages by alias, making it easy to filter and manage communication; - Easy to use: no complex setup, no apps to install - aliases that work anywhere, instantly. Alias Email doesn’t store your messages and never sells your data. Our mission is clear: to give you back control of your email identity in a world that increasingly profits from it.
    Starting Price: $4.99/user/month
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    Heimdal Email Security
    Heimdal Email Security is a revolutionary spam filter and malware protection system which packs more email security vectors than any other platform you can find. Lightweight, easy to deploy, and highly responsive, our anti-malware and anti-spam filter can be scaled to any number of endpoints within your organization. Its MX record-based analysis vectors keep all malicious emails out of your inbox, automatically removing malware-laced attachments, filtering emails coming from malicious IPs or domains, or those containing malicious URLs. Heimdal Email Security secures your business emails against all types of spam email, malicious attachments, email-based malware and ransomware, phishing attempts, malicious URLs, communications from infected IPs and domains, botnet attacks, and email exploits.
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    Cloudmark Authority
    Cloudmark Authority frees network resources, reduces storage requirements and immediately improves the email user experience. Our carrier-grade software solution blocks spam, phishing and malware carrying messages with greater than 99% accuracy and near-zero false positives. Cloudmark Authority utilizes a unique combination of proprietary technologies including Advanced Message Fingerprinting algorithms and real-time threat reporting from the Cloudmark Global Threat Network, consisting of billions of trusted users located in 165 countries around the globe. Protects messaging subscribers from inbound spam, phishing, and virus threats. Industry-leading responsiveness and accuracy to all forms of messaging abuse drive higher customer satisfaction, resulting in a lower cost to serve. Applies the same filtering scheme to outbound messages; scanning and blocking spam, phishing and viruses.
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    Clickback

    Clickback

    Clickback

    Clickback MAIL is email lead generation software, and it’s different from traditional marketing automation and email service providers. How? It lets you send 100% CAN-SPAM (US Anti-Spam Law) compliant email campaigns to your cold or purchased B2B contacts. Clickback MAIL also filters out detected Canadian and European emails to ensure your campaigns remain CASL (Canada Anti-Spam Law) and GDPR (EU Privacy law) compliant. Put your cold email list to work and start landing high-quality B2B leads by sending effective marketing campaigns to your targeted list of contacts. The easy message creator lets you design professional emails that not only look great, but get opened. Use the drag and drop editor to build powerful messages, and preview your content on desktop and mobile screens. The design and feel of your email campaign can have a big impact on its success. A well-crafted email message that also looks beautiful can highlight the professionalism of your brand.
    Starting Price: $280 per month
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    Warmup Inbox

    Warmup Inbox

    Warmup Inbox

    Warmup Inbox automatically raises your email sending reputation through our network of inboxes that talk to each other. The process of preparing an email address for general use or email outreach is commonly referred to as “Warming Up” an inbox, where you take a number of steps to ensure that an email address does not become deactivated, blacklisted, or automatically marked as spam when it begins to send outgoing messages to other recipients. This process is typically done with newly created email addresses but also benefits older email addresses who have been having issues with email deliverability, in that a noticeable portion of their outgoing mail is either landing in a spam folder or blocked entirely by an email server due to either being blacklisted or associated with a domain that has a poor reputation. Warming Up an email inbox essentially is recreating the way a typical person will use an email address.
    Starting Price: $19 per inbox per month
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    SpamJadoo

    SpamJadoo

    Data Infocom

    Spamjadoo – Is world's First Antispam which is fully EAI (Email Address Internationalization) ready and IDN (Internationalized Domain Name) compliant software. The ULTIMATE spam eradication solution – presents a comprehensive and permanent fix to this problem. SpamJadoo is based on the revolutionary ESP (Eliminate Spam at Protocol level) technology, and presents a complete solution based on the privacy. ESP incorporates automated processes to build and update your trusted senders’ list. The innovative JMail concept allows you to create rule-bound mail addresses – you can give these out without compromising your privacy in all situations (e.g. subscribe to a newsletter, purchase online, put on your business card). The challenge/response process is another mechanism to validate the genuine sender. Many more thoughtful techniques have been incorporated. The result : email privacy without ever losing bona-fide mails.
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    MailReach

    MailReach

    MailReach

    Track how your reputation is doing, and maximize and maintain it over time to get the best email results. Get reports to fix your deliverability, enjoy a better inbox placement and stay away from spam. MailReach uses your email address to automatically start email conversations with thousands of high-reputation inboxes. The warm-up emails sent are human, and natural and make sense to build trust. No gibberish content that can harm your reputation. The ramp-up is automated and done gradually following smart rules to maximize the efficiency of the email warm-up. Your warming emails get opened, replied positively, marked as important, and removed from spam and categories. All this positive email engagement increases your email reputation and deliverability. It teaches the inbox providers to send your emails to the main inbox and not to spam.
    Starting Price: $25 per month
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    SMTP Provider

    SMTP Provider

    SMTP Provider

    Experience the next level Email Marketing at an affordable price. Use a dedicated IP address to increase your sender reputation and avoid blacklisting of your IP due to someone else’s actions. Show that it’s really your own company and domain sending the message, and minimize the amount of messages that are marked spam by using the special cryptographic signatures SPF and DKIM. Our SMTP servers send your emails using secure SSL connection. Moreover, it's lightning fast. For each mailing list, you can discover the amount of messages sent out, the number of conversions made and links clicked, and many other details. Our SMTP service generates sending reports and delivery error reports. All reports can be downloaded to your computer. Your mailings won’t be sent to any addresses on the list of recipients who have unsubscribed, even if they are on a mailing list. Make sure that your emails are delivered to the inbox and not the spam folder.
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    Emailchaser

    Emailchaser

    Emailchaser

    Emailchaser is an all-in-one cold email software designed to help users send personalized emails at scale while ensuring high deliverability. It integrates OpenAI's GPT-4o to slightly rewrite each email, preventing identical messages from being marked as spam. Users can access over 200 million verified leads from LinkedIn, utilize AI for email personalization, and send unlimited emails through multiple connected accounts. Emailchaser's inbox rotation feature distributes email sending across various accounts, mimicking natural sending patterns to avoid spam filters. Emailchaser's Sales CRM centralizes responses from different email accounts, allowing users to manage leads, track conversations, and prioritize prospects efficiently. The software also offers campaign analytics for real-time performance tracking and is compliant with major data privacy regulations, including GDPR, CCPA, and the Privacy Shield Framework.
    Starting Price: $37 per month
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    CanIt-PRO

    CanIt-PRO

    Roaring Penguin Software

    CanIt-PRO is antispam email software designed for businesses of all sizes. For challenging e-mail environments that include enterprises, campuses, and ISPs. CanIt-PRO filters e-mail efficiently, effectively and affordably. With CanIt-PRO, administrators block spam by configuring the system and setting global policies centrally; then making them available to end-users, who enroll via a web interface. Providing extensive end-user controls, CanIt-PRO users can choose from a customizable list of spam filtering options such as high, medium, or low spam scanning, or choose the 'Expert Interface' for more granular controls. Available as either software or a plug-and-play "soft-appliance", CanIt-PRO includes anti-virus options and source code - providing the ultimate in customizability.
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    FortiGuard Antispam
    A highly effective antispam is key to protecting your organization because email is the #1 vector for the start of an advanced attack on an organization. FortiGuard Antispam provides a comprehensive and multi-layered approach to detecting and filtering spam processed by organizations. Dual-pass detection technology can dramatically reduce spam volume at the perimeter, giving you unmatched control of email attacks and infections. Additionally, FortiClient endpoint agents can block spam messages on remote computers and mobile devices. In the 2015 VBSPAM Test from Virus Bulletin, Fortinet’s antispam ranked second highest in the security industry for security effectiveness, earning a 99.98% effectiveness rating. Protects your organization against threats delivered through email with highly effective antispam protection. Customize your policies to fit your organization with antispam filtering at a domain, group, or individual user level.
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    ESET Cloud Office Security
    Preventive protection for cloud-based applications such as email, collaboration, and storage. A powerful combination of spam filtering, anti‑malware scanning, anti‑phishing, and advanced threat defense capabilities. Equip your Microsoft 365 Exchange Online, OneDrive, Teams, and SharePoint Online with an extra layer of advanced protection. Helps eliminate unsolicited emails, targeted attacks, and ransomware, allowing employees to focus on their jobs and ensure business continuity. Get immediate notifications direct to your dedicated console, or via alerts. New users are protected automatically. Provides advanced protection for Microsoft 365 applications against malware, spam, or phishing attacks with ultimate zero-day threat defense and an easy-to-use cloud management console. Now using an enhanced, award-winning engine with improved performance, this essential component filters all spam emails and keeps user mailboxes free of unsolicited or undesired messages.
    Starting Price: $119.50 per year
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    N-able SpamExperts
    N-able SpamExperts helps web-hosting companies and ISPs/telcos strengthen email protection. Services include affordable inbound and outbound email filtering and archiving solutions—driven by a continuously updated Intelligent Protection & Filtering Engine to meet emerging threats. N-able SpamExperts software is based on self-learning technology, which provides continuously updated spam and malware protection. Our filtering-system expertise is a direct result of processing email flowing through over 2.5 million active domains daily. Deploy our enterprise-grade solutions to secure and archive email. Help protect your customers with efficient first-level incoming filter defense that runs in front of the email infrastructure, improving resource efficiency and saving hosting servers’ resources. Enjoy rapid cloud deployment—with no hardware to purchase and maintain—or leverage on-premises hardware for local email security and archiving. Integrate with your favorite control panel.
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    GFI MailEssentials
    Why trust email security to one antivirus engine when you can have the combined power of four? GFI MailEssentials can engage the power of leading brands including BitDefender, Avira, Kaspersky, and Cyren. Each engine features its own heuristics and detection methods. You gain maximum protection for your email environment to block email-borne viruses and other malware more effectively. Spam is estimated to be 45% of your email volume. GFI MailEssentials uses 14 advanced email filtering technologies you can see in action. Filter spam out before it hits email boxes to save your server space and productive time. Block spoofed emails, stop emails from blacklisted DNSs or those that link to known problem URLs or phishing sites, remove non-RFC compliant emails, detect emails from forged senders and more techniques to slash the spam waste. GFI MailEssentials is compatible with different email servers, not just Exchange. It fits seamlessly into your current setup.
    Starting Price: $99 one-time payment