Swaks

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

Project Activity

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License

GNU General Public License version 3.0 (GPLv3)

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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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