Greys. Sports. Almanac.

I use Mail-in-a-Box on a VM at home. Static IP from my ISP. Been working well for years now. I recommend it.

If your IP isn’t trusted you could always use an SMTP relay somewhere else.

I like Mailinabox

You can use it in the cloud or fully self-host on your own hardware if you want. (Assuming your ISP allows this)