swaks (Swiss Army Knife for SMTP) is a powerful command-line tool for testing and debugging SMTP servers. It allows users to craft custom SMTP sessions with fine-grained control over headers, authentication, TLS, attachments, and more. swaks is commonly used by sysadmins and developers to diagnose mail delivery problems or test SMTP server configurations.

Features

  • Sends test emails via SMTP with full control over the session
  • Supports authentication (LOGIN, PLAIN, CRAM-MD5)
  • TLS/SSL encryption support
  • Header customization and MIME/attachment testing
  • SMTP pipelining and IPv6 support
  • Debug output for troubleshooting mail servers

Project Samples

Swaks Screenshot 1

Project Activity

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Categories

Software Testing

License

GNU General Public License version 3.0 (GPLv3)

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Swaks Web Site

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Additional Project Details

Operating Systems

Linux, Mac, Windows

Programming Language

Perl

Related Categories

Perl Software Testing Tool

Registered

2025-07-25
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