Open source mail delivery platform for incoming and outgoing e-mail, self-hosted on Docker, a SendGrid or Mailgun alternative on your own servers.
You pay for SendGrid
There is an open source for SendGrid
1 reviewed open source alternative to SendGrid so far. More in review.
"I now use Postal Server for all my SaaS, which is self-hosted via docker, and has all those those features. The good thing is your maintain the IP reputation yourself and your not paying exorbitant prices when sending large volumes of transactional emails (really it's just the cost of the server you install it on)."
| Project | License | Stars | Last release | Hosted | Docker | Zero terminal | Install path |
|---|---|---|---|---|---|---|---|
| Postal | MIT | 16.7k | 2026-06-03 | No | Yes | No | Install path |