Any recommendations for a relay-only MTA that supports retries?

• smtprelay

  7 400 7.0 Go

  Simple Golang SMTP relay/proxy server

I know about dma, ssmtp, msmtp, nullmailer and https://github.com/decke/smtprelay/, but these don't seem to support queuing and retries.

• OpenSMTPD

  18 475 9.1 C

  This is official OpenSMTPD Portable repository. Forks, pull requests and other contributions are welcome!

  

Have you looked at OpenSMTPD?

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• django-sendmail-backend

  1 23 10.0 Python

  Its a simple command line sendmail backend for Django

As I'm learning more I see I didn't formulate my requirements quite right. My client app is a SMTP client (a Django webapp, it uses Django's default email backend, which uses python's smtplib). It needs a TCP port to connect to, but looks like both nullmailer and dma doesn't offer that. Instead you have to inject messages in the queue by calling the sendmail binary. Now, there's a 3rd-party Django email backend that uses sendmail but that has its own new set of problems ;-)

Suggest a related project