andrewmiskell/alpine-mailgun repository overview

⁠mailgun-smtp-server

This is a docker⁠ image that makes use of midi-smtp-server⁠ project and the mailgun-ruby⁠ SDK to accept SMTP email via standard methods and relay those messages via the mailgun HTTP API rather than the mailgun smtp servers. It's a neat little tool that allows you to act as an SMTP server for legacy systems, but operate without using outgoing SMTP traffic (which may be blocked by your ISP).

⁠Usage

docker run --name mail \
  -e MG_KEY=yourmailgunapikey \
  -e MG_DOMAIN=yourmailgundomain \
  -p 25:25
  andrewmiskell/mailgun-smtp-server

• MG_SMTPD_SIMULATENOUS_CONNECTIONS can be passed to allow more than 4 simulatenous connections
• MG_SMTPD_OPTIONS maps to opts parameter in midi-smtp-server's Smtpd class.
• MG_SMTPD_PORT can be passed to bind to a port other than 25
• MG_SMTPD_ADDRESS can be passed to bind the server to an address other than 0.0.0.0

⁠License/Author/Credits

License: Apache v2 (see LICENSE file in this repository for details)

Credits:

• Thanks to the original author Steve Nolen (https://github.com/stevenolen/mailgun-smtp-server⁠)
• Thanks to Tom Freudenberg⁠, 4commerce technologies AG⁠ for the awesome, extensible and dreadfully simple smtp server.
• Thanks to mailgun⁠ for their service and ruby sdk.