[zcdziura]

I host my own mail server on Vultr. One thing to note if you want to use them is that, by default, they block outgoing SMTP ports by default. You have to file a support ticket to unlock that port for your account, and you need to have a server running under your account on their infrastructure for at least a month before they'll unblock the port.

It's a bit annoying, but they do it to prevent people from using their infrastructure to send spam. And you only ever have to do it once.