postalhq/postal

📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail

16,804

stars

650

commits

Ruby

primary language

Sep 5, 2026

updated

postalserver.io

mail

mail-server

postal

ruby

smtp

Browse cluster: Ruby documentation and site generation →

README

GitHub Header

Postal is a complete and fully featured mail server for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready for you to run on your own servers.

Documentation
Installation Instructions
FAQs & Features
Discussions - ask for help or request a feature
Join us on Discord

Contributors

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513 commits

48 commits

24 commits

11 commits

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Languages

Ruby

76.3%

Haml

15.3%

SCSS

6.2%

postalhq/postal

📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail

16,804

stars

650

commits

Ruby

primary language

Sep 5, 2026

updated

postalserver.io

mail

mail-server

postal

ruby

smtp

Browse cluster: Ruby documentation and site generation →

README

GitHub Header

Postal is a complete and fully featured mail server for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready for you to run on your own servers.