[knadh]

You can use SES's SMTP interface with listmonk. With some added effort, you can self-host an SMTP server and achieve better throughput, and depending on the volume, cost reduction. We've been running our own Postal SMTP instances successfully.

[lostmymind66]

Are you talking about hosting your own smtp server?

The issue is that you need to put lots of effort into getting off of blacklists, or your email won't be delivered.