Hey everyone! My organization sends out about 16 million emails each month, mainly transactional ones from a mix of systems in our data centers. Right now, we're using a commercial email security gateway that's primarily meant for inbound protection, but it also manages our outbound emails. Unfortunately, it lacks SMTP-Auth support, so we're on the hunt for a self-hosted solution that does have that capability.
Aside from handling high email volumes, we also need features like DKIM signing, SMTP-Auth, and robust logging/reporting functionalities (like tracking largest senders, transaction logs, and the ability to forward logs externally). Has anyone had experience with high-volume sending and can recommend what worked for them?
6 Answers
Have you looked into the Proxmox Mail Gateway? It supports DKIM and can be clustered, which sounds like it could fit your needs!
To get started, what triggers your emails, and what’s your budget for the self-hosted server? You might also want to check out commercial options like SendGrid for an easier setup.
Are you primarily using Windows? You can set up a Linux server with Postfix to handle your emails. Just ensure everything is configured right, especially DKIM signatures.
Thanks! We’re flexible with the OS, so Postfix could work. The only concern is that it seems tough to get the detailed reporting we need with it. Any thoughts?
Just to clarify, we're aiming for a dedicated sending setup now—we don't need the inbound protection anymore!
Make sure to build a good sending reputation and manage bounces effectively. Avoid repeatedly sending to non-existent addresses.
Check out Hurricane MTA as another option for your needs. It has good capabilities for high volumes.
This looks promising! I’ll definitely check it out—thanks!