Alternatives to SendHealth
Compare SendHealth alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to SendHealth in 2026. Compare features, ratings, user reviews, pricing, and more from SendHealth competitors and alternatives in order to make an informed decision for your business.
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1
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." -
2
SendGrid
Twilio SendGrid
Email is the backbone of your customer engagement. The Twilio SendGrid Email API is the email service trusted by developers and marketers for time-savings, scalability, and delivery expertise. Our flexible Email API and proprietary Mail Transfer Agent (MTA), intuitive console, powerful features, and email experts make it easy to ensure all your email gets delivered in seconds and without interruption. Monitor engagement data and optimize deliverability with our Deliverability Insights dashboard. Whether you’re sending 100 emails or 100 billion, SendGrid is built to scale. Integrate with our RESTful APIs and SMTP in minutes, with sample code libraries available in 7 languages, interactive docs, templates, and more.Starting Price: $19.95 per month -
3
GlockApps
GlockApps
Where are your emails delivered? Receive reports with an in-depth understanding of what your emails are doing and how to increase your reputation and deliverability before you hit Send! In your reports you can: ❖ Check to see if your sending IPs or Domains are listed within 50+ major email blacklists. ❖ Protect your identity by identifying, monitoring, and rejecting unauthenticated outgoing emails. ❖ Identify whether your email’s content or reputation is being flagged as Spam by all major B2B and B2C email marketing providers. ❖ Fix HTML errors and identify “risky” content before sending. ❖ Get instantly notified when issues occur by email, Slack, or Telegram. Want to speak with an expert? Book a 1-hour consulting call to get all your email marketing and deliverability questions answered. We also offer comprehensive Email Deliverability Audits with personalized recommendations for companies looking to maximize their revenue with email.Starting Price: $9 per month -
4
SMTP.com
Ziff Davis
Reliable SMTP relay and email delivery services. Powerful email delivery services that enable you to send and track high volume emails effortlessly. Integrate and start sending in minutes. All your transactional, email relay and email delivery needs under one roof. Whether you need a low-latency email delivery provider for your transactional emails, scalable infrastructure for high-volume sends or reliable backend solution for your marketing campaigns, SMTP is built to deliver. Reputation Defender is SMTP’s proprietary technology that uses big data to proactively monitor your email list health and safeguard your domain and IP reputation among ISPs by suppressing bad emails in your sends from hard and soft bounces. This ensures your delivery rates and inbox placement incrementally gets better over time.Starting Price: $25 per month -
5
Inbox Monster
Inbox Monster
Inbox Monster helps email teams send epic messages to every inbox. With creative rendering and deliverability tools, you can find your email rawwwr. Expert Services: Truth: You need an expert by your side. Sending email is a lot. And the rules are constantly changing. That’s why having proactive support to help you make it to the inbox is just worth it. For your sanity and bottom line. Creative Suite: Creative testing, with a glow up. We’re doing email testing a little different. There’s a new way to test out your email creative. Get previews of your emails, plus killer diagnostics to help you get closer to perfect. So you can send with confidence. Not sweaty palms. Deliverability Suite: Don’t be a spammer. Like ever. Deliver more from your email program. More emails in the inbox. More revenue from your program. More kudos from your boss. Get the new way to dig into all aspects of your email deliverability. SMS Suite: Reach the phone obsessed. (So, everyone.) Flawless -
6
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 -
7
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 -
8
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 -
9
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 -
10
MailMonitor
MailMonitor
Knowing exactly where your campaigns are going to land is important, but ensuring they reach your subscribers’ Inbox is a game-changer. Email Marketing is about building trust with internet server providers. Tracking your reputation and keeping it strong helps improve your email deliverability. Solving your email deliverability issues starts with tracking your reputation. Find out how the largest spam filter companies rate your campaign. Blocklists can significantly hurt your reputation. Monitoring your IP addresses and domains help you take immediate action and delist if you get blocklisted. Reinforcing email authentication provides the strongest email domain protection, ensuring proper deliverability to all your email campaigns. Customer experience is key to all first-class brands. Email previews help you detect bad formatting, broken links and code issues, before they reach the Inbox.Starting Price: $299 per month -
11
Sync.ME
Sync.ME
Identify spammers and block robocalls with the world’s best reverse phone lookup and spam blocker app. It has never been easier to sync contacts and reveal the true caller. Search phone numbers and get the caller ID. Make a reverse phone lookup, detect robocalls and report blacklist. Block spammers, block telemarketers, block callers, block robocalls, block SMS and block text messages. Block callers, telemarketers and block robocalls. Block unknown calls with our best call blocker. Block spam calls and add spammers to your blacklist. Sync.ME lets you identify spam calls, telemarketers, robocalls and see whos call it is. Show the truecaller ID and make a reverse phone lookup to block callers. You can block spam calls and robocalls with the best call blocker with a tap of a button. -
12
Suped
Suped
Suped is a DMARC monitoring platform that helps startups and enterprises secure their email. We provide clear analytics, instant threat alerts for spoofing attempts, and step-by-step guidance to strengthen your domain's security. Stop phishing, improve your domain reputation, and make sure your emails hit the inbox every time. DMARC Report Analysis: Automatically processes complex aggregate (RUA) and forensic (RUF) reports into a simple dashboard. Real-Time Threat Alerts: Instant notifications for potential domain spoofing and phishing attempts. Guided Policy Enforcement: Step-by-step guidance to safely strengthen your DMARC policy to p=reject without blocking legitimate email. SPF & DKIM Monitoring: Track authentication alignment across all your sending services to diagnose delivery issues. Domain Health Score: At-a-glance score based on your compliance, reputation, and blocklist status. Unlimited Domains: Monitor DMARC for all your domains from a single account.Starting Price: $11/month -
13
Inboxable
Data Axle
Inboxable’s deliverability monitoring features allow you to accurately measure email campaign performance and develop proactive deliverability strategies. Our email builder tool helps you create beautiful messages without the need for coding. View each campaign’s inbox placement in near real-time, instantly detect any deliverability issues or even stop a mailing, should a major block occur. ISPs enlist the help of blacklists to determine which emails should be blocked in order to protect users from irrelevant or malicious messages. Inboxable allows you to track how your IPs and sending domains are performing at all major blacklists. Your IPs and domains are scanned against all major blacklists on an hourly or daily basis, depending on the blacklist’s size and potential impact.Test email creative to ensure proper rendering in over 60 different email web, desktop, and mobile clients.Starting Price: $1,000 per month -
14
Email on Acid
Sinch
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 -
15
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 -
16
MailChannels
MailChannels
Secure and deliver email at scale. Use MailChannels to uncover bad actors and prevent spammers from taking advantage of your infrastructure. Monitor outgoing email messages for spam and unusual sending activity. Protect your customer inboxes against spam, phishing, and other email threats. A powerful, intuitive interface makes managing your customers simple and efficient. We operate across multiple clouds and minimize single points of failure to keep our services online, all the time. Get a real human response to your ticket within 30 minutes or less, 24/7/365. MailChannels Outbound Filtering is a cloud-based SMTP relay service which identifies and blocks spammers to ensure reliable email delivery. With Outbound Filtering, you can eliminate email delivery problems caused by IP address blocklisting. Automatically shut down compromised accounts and scripts to improve your security.Starting Price: $79.99 per month -
17
Mailtrap
Railsware
Mailtrap is an email delivery platform for developers and product teams, providing a flexible RESTful API and SMTP service to send emails at scale. The platform is built with a focus on high inboxing rates, fast delivery, and 24/7 technical support from deliverability experts. Mailtrap ensures 99.99% uptime with dedicated IPs, auto warm-up, and sender reputation protection. Developers can integrate quickly using SDKs for major languages (Python, Ruby, PHP, etc.) and manage high-volume sending with a customizable API. The platform provides industry-best analytics with helicopter-view dashboards to monitor key metrics and 30-day logs for easy debugging. Trusted by over 150,000 monthly active users including Yelp, PayPal, Atlassian, and Adobe.Starting Price: $15/month -
18
Maileroo
Maileroo
At Maileroo, we provide a powerful platform for both SMTP relay and email marketing. We ensure fast, reliable email sending with real-time tracking of deliveries, clicks, opens, and bounce rates. With our free Email Verification API, dedicated IPs, and DNS Records for sender authentication, we help reduce bounced emails and improve deliverability. Our email marketing platform makes it easy to create and manage campaigns. You can personalize emails, use our drag-and-drop email templates, form builders, and flexible Contacts API. We provide real-time statistics and in-depth analytics to help you optimize your campaigns and boost engagement. We also offer seamless DNS setup, automation tools, multi-sender identities, and efficient contact management. Whether you're a small business or growing enterprise, Maileroo offers budget-friendly pricing and everything you need to scale your email marketing, making it a smart choice for businesses of all sizes.Starting Price: $10 per month (25,000 emails) -
19
SendPost
SendWorks
SendPost replaces manual workarounds, messy hacks and daily frustrations that come along with your email API/SMTP provider. See if you are sending only a few thousand emails then most email API solutions work well. You will choose one of them based on price, features or support. The real problem comes if you are one of the big senders—sending millions of emails per month. That's when managing multiple sending domains, IP-Pools and IP/Domain reputation becomes a severe headache. At that scale, even a minor dip in your email open rate or deliverability impacts your revenue. You want a solution which helps you understand what broke with your email deliverability and how you can fix it quickly. You don't want to spend hours wading through logs and manually checking if your domain or IP is blacklisted or your sending reputation is low.Starting Price: $7 per month -
20
Antideo
Bizmindz Technologies LLP
Protect your Outreach Channels from Temporary Emails & Spammers We help you validate Email Address, detect Location and validate the IP's against a know list of Spammers housed within various Open Source spammer lists Email Validation Avoid receiving disposable email addresses on your prospect forms IP Health Check Stop the use of Proxies from people visiting your Website or Mobile App Phone Validation Validate a wide range of both national and international numbers worldwide.Starting Price: $5 per month -
21
Everest
Validity
An email success platform like no other. Created by the most respected pioneers of email optimization and deliverability, Everest is the absolute pinnacle of email marketing–the only solution in the world that gives you full control of all critical stages of email marketing: pre-send prep and creation, in-flight optimization, and post-send monitoring. If you’re serious about reaching the top, Everest was made for you. Everest is the only email platform in the market that gives you actionable insight and intel about what’s happening with your campaigns, at all times. Ensuring your campaign is in the best shape possible is crucial to its chances of success. Enhance your campaign performance in real-time, while it’s live. Really. Improve future campaigns by building and maintaining your sender reputation. -
22
Calls Blacklist
Vlad Lee
"Calls Blacklist" is both a call blocker and an SMS filter. You can easily block calls and messages from unwanted, private (hidden, anonymous), or unknown numbers. If you are tired of annoying calls or messages, telemarketing, spam, and robocalls, then "Calls Blacklist" is your solution. It is a very simple and lightweight call blocker, but still powerful. The only thing you need to do is add unwanted numbers to the blacklist. This app also provides fully functional integrated SMS messaging. You can easily send, receive and manage SMS. You can also manage conversations and block SMS spam using just one app. Once you have enabled SMS blocking, the app's built-in SMS messenger will be available. You can manage all the spam numbers, and even more, with this app, you can block spammers according to the text of the messages. And of course, it's easy to save blacklist numbers to a file and import them to another device.Starting Price: Free -
23
Campaign Cleaner
Campaign Cleaner
Campaign Cleaner is an all-inclusive tool designed to optimize email marketing campaigns. It offers over 20 unique features, each aimed at enhancing email deliverability, engagement, and ROI. Key features include a CSS Inliner for improved email client compatibility, a Font Color Adjuster for better readability, and a Spam Trigger Detect to keep emails out of spam folders. It also offers a Blacklist Link Check to avoid blacklisted URLs, an HTML Sanitizer for clean and safe code, and a Non-ASCII Character Replacement to ensure proper email display. Additional features like Broken Link Detection, HTML Compression, and Font-Size Adjuster further enhance the tool's effectiveness. Each feature contributes to creating more efficient and effective email marketing campaigns, making Campaign Cleaner an invaluable asset for marketers.Starting Price: $0 -
24
MailGenius
MailGenius
Our experts work as an extension of your team to provide efficient email consulting on critical issues, and connect you to industry email partners to make your marketing program more successful now. Book a free meeting with a MailGenius vetted email expert. Your emails will reach the inbox and stay there. Our email experts can fix your Email deliverability issues and help you increase your email opens, email clicks and email marketing sales. The solutions are determined by your setup, volume, and needs. Schedule a intro call with the team so they can understand exactly what you’re looking for. -
25
CallApp
CallApp
Automatically identify phone calls from spammers, telemarketers, unknown and unwanted numbers. Choose a number and add it to your blacklist with a single tap. You will never be bothered again by an unwanted call! Record all your calls with CallApp! Save your conversations and never worry about missing an important detail again. Set any video as your ringtone to relive the memories at every ring! Even choose a different video for each contact. Send a Whatsapp message to any number even if you haven’t saved it as a contact! Manage your incoming and outgoing calls using caller ID, spam call blocker, call recordings & dialer app! Blacklist numbers – add spam calls, block numbers & contacts from your phone book or dialer to our caller ID & call recorder app. Blacklist a phone number & never get robocalls from unknown callers again! Use the phone number search to see “who called me” & call blacklist the spam numbers you wish to block. -
26
Litmus
Litmus Software
Build, edit, and instantly preview your emails across 90+ clients. Plus, utilize integrations with popular email platforms to speed production and reduce errors. Catch broken links, images, and tracking, as well as test campaign load time, scan your subject line for improvements, and more with a simple, automated check. Quickly identify potential issues preventing your email from being delivered, and use actionable in-product advice to fix them.Starting Price: $99 per month -
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Barracuda Spam Firewall
Barracuda
Spam, malicious email and virus attacks are becoming ever more sophisticated. Your corporate email is a gateway that can allow sensitive information to be destroyed or lost as well as for attacks that can hurt your network performance and employee productivity. The Barracuda Spam Firewall scans email and incoming files using three layers of powerful virus scanning technology. The firewall connects to the Barracuda Security Cloud to for the most up-to-date protection against the latest email-borne threats. Threats do not always come from the outside. The firewall also checks for internally tainted email to prevent the spread of viruses that don’t access the email gateway. Barracuda is the industry leader in spam protection for businesses. The Barracuda Spam Firewall leverages Barracuda Central to identify email from known spammers and determine whether domains embedded within emails lead to known spam or malware sites.Starting Price: $699.99/one-time -
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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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Mailinator
Manybrain
Test your trial sign ups, account creation, marketing Emails, and SMS for interactions and receipts at production scale - instantly! Upgraded plans get private inboxes at private domains unique to your account, Web and API access, message routing rules, permanent storage, and high daily limits. Mailinator is really, really good at Email. But it handles any kind of Message. You can add an SMS to your Private Domain(s) for SMS Workflow Testing. Or have a third-party send their JSON Payloads right to your inboxes! Save your teams time by never having to create an email address. With Mailinator, every possible email address (at your Private Domain) is available to use right away Access all your messages via our Web Interface, our API, or have Mailinator automatically Webhook them back to you. Our Rule system can also Click-Links, Forward, and more!Starting Price: $99 per month -
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Sender Score
Sender Score
Your Sender Score is like a credit score to gauge your credit worthiness but for email: It measures the health of your email program. Sender Score is a number between 0 and 100 identifying the quality of your sender reputation and details how mailbox providers view your IP address. Mailbox providers take a lot of metrics into consideration to determine your sender reputation including spam complaints, how many unknown users you email, if you’re on any industry blacklists, and more. If your Sender Score is below 70, you need to repair your sender reputation. Download the Fundamentals of Email Marketing to understand the criteria mailbox providers use to determine which senders reach the inbox and how to improve your performance. Continue following industry best practices and optimizing your email program. Download the Secrets of Best in Class Senders to learn how to build and run an effective email program. -
31
ISnotSPAM
ISnotSPAM
Sending newsletters and email marketing is not easy. You need to work on the design, the graphics and the content. Being busy with all that work, you might forget to check if your content is set to trigger some spam filter which will send your hard work straight to the subscribers' spam folder. IsNotSpam online spam checker was created to help you test email and newsletter content, and alert if it is likely to trigger spam filters. 99.99% of email accounts use spam filters these days. Spam filters recognize spam messages by analyzing message content for spam characteristics. Sometimes these filters fail and mark legitimate emails as spam. Such emails are sent to the Spam folders and are not seen by the recipient. This filter failure is called a "false positive" as it marked a legitimate non-spam message as spam. Newsletter senders and email marketers need to check that their emails do not have spam characteristics in order to lower the risk of their newsletters being marked as spam. -
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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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DMARC Report
DuoCircle
A DMARC reporting solution for MSPs, service providers, and businesses who need to monitor and manage a large number of domains for DMARC compliance. Block malware and phishing attacks. Monitor domain security and boost deliverability with one easy-to-use platform. With DMARC Report, it’s super easy to monitor email configurations for suspicious activity and stop non-compliant emails before they hit inboxes. This high-volume tool can secure multiple domains for your clients or your business and report on robust analytics from the intuitive dashboard. You can safeguard outbound mail to protect your sender reputation, as well as leverage strong filtering policies for inbound emails. The platform automatically generates aggregate and forensic data reports that track any DMARC failures for your domains. If suspicious activity is detected, DMARC Report will send threat alert notifications to any email address that needs to be in the loop.Starting Price: $100/month/2 million emails -
34
HELO
Beyond Code
HELO is a desktop application designed to simplify email testing and debugging for web developers by capturing and analyzing outgoing emails generated by applications during development. Instead of sending emails to real recipients, HELO exposes a local SMTP server that intercepts outgoing messages and displays them inside the application, allowing developers to inspect and verify them before deployment. This approach helps prevent common problems such as broken links, missing images, formatting errors, and other issues that often appear in production emails. It provides detailed debug views that show the email in multiple formats, including HTML rendering, plain text, raw source code, and full message headers, giving developers a complete understanding of how the message is structured. Automated validation tools check links within the email to confirm they return valid HTTP responses, reducing the risk of sending emails with invalid or broken URLs.Starting Price: $49 per month -
35
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 -
36
Kickbox
Kickbox
Test, monitor and optimize your email programs to reach more subscribers and increase your ROI with the #1 trusted email verification and all-in-one deliverability solution. Gain actionable insights by uncovering the health of your opt-in email lists to reduce bounces, protect your sender's reputation, and reach more high-quality subscribers. Prevent missed opportunities and increase your email ROI by connecting our real-time API wherever you collect email addresses online. Virtually eliminate hard bounces from fake, mistyped, or invalid email addresses. Monitor your sending domains and IP addresses for blocklistings. Real-time alerts allow you to quickly respond to resolve potential issues. Helps you determine whether your message is landing in the inbox or in spam by mailbox providers, like Gmail, Outlook and iCloud. Precheck email messages for content and design errors and spam filtering issues before sending. -
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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. -
38
MailSlurp
MailSlurp
Create unlimited private email addresses on demand in code, tests, or online. Send and receive emails and attachments and process emails with HTTP Webhooks, Zapier integrations, and team dashboards. Test user authentication, forgotten password, email verification and more for your application using real email addresses. Use REST API, developer SDKs, and Zapier integrations to receive emails in code, test user sign up flows, and save new contacts and attachments to Google Drive and more. Generate inboxes with custom domains or randomly assigned email addresses. View emails and attachments in code, tests, or using team web apps. Process text messages for real phone numbers using webhooks and REST APIs. Send and receive emails in code or tests using webhooks or waitFor function. Search and match emails. End-to-end test applications using real email addresses.Starting Price: $22.80 per month -
39
Labnify
Labnify
Labnify provisions email API and SMTP-integrated mailer so you won't need any of those pesky SMTP credentials. A system that delivers and track mass emails reliably enriched with features like real-time analytics, open/click metrics, bounce/spam tracking, template builder, and more. No one likes being blacklisted. That's why our innovative blacklist monitoring feature keeps a watchful eye on your sending reputation, ensuring your emails always land in the recipient's inbox. Plus, Labnify takes email authentication seriously, utilizing DKIM/SPF authentication to enhance your deliverability and add that extra layer of security. Millions of emails have relayed via Labnify as it's easy to work with. Simply import your email list and hit SEND without the need for an SMTP credential, making it a 2-in-1 email marketing stack. Built on the most cost-effective Email API, deliverability and scalability matter. Easily connect and send your email using our automated system and scale.Starting Price: $99/month -
40
TrulyInbox
TrulyInbox
TrulyInbox’s warm-up sends emails like a real human, one at a time and at varying intervals for natural interaction with your inbox for a high Sender’s Reputation. You can increase your email frequency gradually as your Sender’s Reputation improves, helping to ensure that your emails land in the right inbox and avoid being marked as spam. TrulyInbox’s deliverability score lets you track your inbox reputation and deliverability rate, allowing you to keep an eye on your sending pattern. Anyone who sends cold emails for a wide range of use cases, such as marketing, and lead generation purposes. Outreach specialists, recruiters, marketers, salespeople, etc can benefit from email warm-ups.Starting Price: Free -
41
OutboundSMTP
OutboundSMTP
DKIM Signing improves the inbox placement of mailbox providers like Gmail, Office365. Multiple Servers in the USA and Europe for increased reliability. No more headaches of managing and maintaining your own email server and IP reputation. Create SPF and DKIM records for your domain names, no prior experience required. If you are suffering from an IP blacklisting our SMTP relay service can solve your reputation problems. 24×7 technical support via phone, chat or email. We are here to ensure your mail gets delivered. you’ll be able to deliver your mail reliably to the inbox. We optimize our sending routes and closely monitor our IP reputations to ensure you the best possible service. We have a Zero Spam Policy that allows us to block or restrict messages that would damage our reliability or the reputation of our customers. You may send from an unlimited number of “From” addresses or domains after you have verified your domain ownership via DNS.Starting Price: $4 per 2,500 messages -
42
SmartReach
SmartReach.io
SmartReach.io is a simple yet powerful sales engagement software that helps automate cold outreach, personalizes messages with AI recommend, and tracks results using an advanced scheduler and powerful apis & integrations. Your billed based on the prospect you contact. Yes, unlimited sending emails SmartReach.io helps you generate qualified leads, book meetings, and close deals. It automates outreach across email, LinkedIn, WhatsApp, SMS, and calls, helping you reach more prospects and generate more leads. SmartReach specializes in email deliverability with features like inbox rotation, unlimited emails, ESP matching, inbox placement, free email verification, free warmups, spam test, Spintax and much more Its Shared Inbox helps teams get productive and collaborate better. SmartReach.io provides in-depth reporting, actionable insights, and increased sales due to high email deliverability, making it an excellent choice for sales leaders to manage and make decisions.Starting Price: $29 per month -
43
Postmastery
Postmastery
Postmastery provides a platform for professional email monitoring that goes far beyond the obvious ‘click & open’ statistics. Postmastery’s Delivery Analytics platform processes SMTP delivery data from both on-premises mail servers and SMTP providers. It reads data from Microsoft SNDS, Return Path Sender Score and relevant blacklists. Users have access to real time dashboards and receive automatic alerts. High bounce rates, increased delivery times, junk foldering or blacklisting are serious problems in email marketing and they impact your business. Since they affect your reputation , it's best to stay ahead of them. Postmastery offers a baseline for improvement and carries out an email delivery assessment. And, if needed, our specialists provide hands-on support at infrastructure level as well. Focus on your core business and outsource your delivery monitoring to Postmastery. Email delivery experience, expertise and tooling is at your disposal via our 'email delivery control centre'. -
44
E-HAWK
E-HAWK
Block fake leads and fraud sign-ups. Our cloud API identifies phishers, bots, spammers, fraudsters, high-risk users and links lead quality to marketing performance. E-HAWK performs hundreds of risk checks in real-time giving you detailed insight, actionable information, and improving your fraud stack and cybercrime detection. Free trials and registrations are a great way to attract new users into your online community. But many are fake. Some are trying to use your platform for phishing, sending out spam, identity theft, and fraud. E-HAWK can automatically filter out many bad actors, so you can focus your time taking care of your good clients and building your business. Real leads are gold. Invalid or fraud leads are impossible to reach and often a waste of time. Why not use our pre-built tests to check for issues with emails, locations, IPs, phones, domains, etc. before investing marketing resources and sales efforts? -
45
MxToolbox
MxToolbox
Are you confident that your email is getting through? You rely on email for business critical communication, so you need to know your email has been delivered to your customers and you need to know who is sending email on your behalf. MxToolbox is your expert on email deliverability. Our newest product, MxToolbox Delivery Center, gives you the insight you need to manage your email configuration and troubleshoot emergent email issues in order to improve your email delivery. SPF, DKIM and DMARC can be complicated. MxToolbox Delivery Center is your comprehensive service for understanding email that has been sent "From" your domain. MxToolbox Delivery Center provides a complete analysis of the blacklist reputation for all of your email sending sources. No matter who is sending email on your behalf, your email reputation will be closely monitored to protect your email delivery and business from blacklisting.Starting Price: $129 per month -
46
Coresender
Coresender
We get your emails delivered in seconds. Your customers never have to wait for the emails they are expecting or need immediately, like password resets, order confirmations etc. We do all the hard work to place your emails straight in your recipient’s inbox, so you can focus on delighting even more customers and growing your business. Transactional emails, such as password resets, email confirmation links, order receipts must be delivered immediately. We ensure that they are always our top priority. That’s why we’ve separated our sending infrastructure, to ensure this priority. When you use a transactional sending account, you know your most important emails will never be affected even by the biggest of your email marketing campaigns. Your sender reputation is critical for email delivery and should always be your concern. We work with you every step of the way to improve your sender reputation score and keep it at a high level. -
47
eDataSource
eDataSource
The most comprehensive email deliverability suite in the industry has just been supercharged. Powered by live feedback from nearly 500 million Cloudmark-protected consumers, Inbox Tracker Cloudmark Edition gives you unprecedented access to email delivery intelligence. Go far beyond simply calculating your spam score. Find out why your emails are sent to the spam folder so you can pinpoint and correct delivery issues with near-surgical precision. The first of its kind, Competitive Tracker is the most powerful, comprehensive, accurate search tool on the market today for delivering email marketing intelligence. Using insights from real consumer inboxes, it returns information and insights quickly, without compromising depth or detail, so you can compete more effectively in the inbox. Competitive Tracker offers flexible search capabilities, alert functionality, and fully customizable charts and reports. -
48
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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PowerMTA
Bird
PowerMTA is an enterprise-grade email message transfer agent (MTA) software for sending high-volume, business-critical emails. PowerMTA can be run on your own server or in any public cloud such as Amazon Web Services or Microsoft Azure. With unmatched reliability and powerful analytics, PowerMTA gives you total control of your email sending. Improve performance, deliverability, and team efficiency with a simple set up, a small hardware footprint, and robust analytics. Try PowerMTA with Signals today, with volume pricing starting at $8,000 per year. PowerMTA includes SparkPost Signals, offering a complete view of your email sending. Analyze per-domain, per-campaign, and even per-recipient performance, allowing you to optimize your sending and prevent problems before they occur. PowerMTA provides unsurpassed delivery and performance in a stable SMTP environment. High-speed sending with total control.Starting Price: $8000 per year -
50
testmail.app
testmail.app
Get unlimited email addresses and mailboxes for automating end-to-end tests with our simple APIs. Email verifications, passwordless signins, etc. Are they triggering when expected? Are emails reaching the inbox? Never spam real customers by mistake - send your test emails to {namespace}.{tag}@inbox.testmail.app. Signup to get your {namespace}. The {tag} can be anything: each tag makes a separate email, so you can create unlimited real email addresses and mailboxes on the fly by simply changing the tag! Use any HTTP or GraphQL client of your choice in any language or environment including CI/CD pipelines. Take it further with awesome features like advanced search with wildcard match, "live" queries (waiting for new emails), sorting, pagination, attachments, SpamAssassin reports, and more. Together you can create separate namespaces (and mailboxes) for each project, securely provision and retrieve API keys, share test emails, monitor usage, and manage team membership.Starting Price: $9 per month
