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postal๐Ÿ“ฎ A fully featured open source mail delivery platform for incoming & outgoing e-mail

๐Ÿ“ฎ A fully featured open source mail delivery platform for incoming & outgoing e-mail

16,462 stars
1,230 forks
Ruby
MIT
Alternative to:
SendGrid
Amazon SES
postal screenshot

postal

Postal is a complete, fully featured open source mail server for websites and web servers. It provides a self-hosted alternative to commercial services like Sendgrid, Mailgun, and Postmark, giving you complete control over your email infrastructure.

Key Features

  • Full Mail Server: Complete incoming and outgoing email delivery platform with SMTP support
  • Open Source: MIT licensed and ready to deploy on your own servers
  • Production Ready: Designed for websites and web applications requiring reliable mail delivery

Use Cases

  • Transactional Email: Send application-generated emails like password resets and notifications
  • Email Hosting: Host email services for multiple domains on your own infrastructure
  • Development & Testing: Self-hosted mail server for staging and development environments

Who Is It For

Postal is ideal for developers, system administrators, and organizations that need a self-hosted mail delivery platform with full control over their email infrastructure and data.