[sha256sum]

>now route my self-hosted email through SMTP2Go thanks to a tip from another commenter here

I think you're referring to this: https://news.ycombinator.com/item?id=31180604

> I host my own email server with Vultr on an OpenBSD VM using OpenSMTPD and Dovecot, relaying all outbound mail through SMTP2Go (their free tier more than meets my needs). I have all of the necessary DNS entries set to mark my mail as legit, and I sign all outgoing mail using strong 2048-bit RSA keys. Thus far, I'm able to send mail and not have it marked as spam (at least to everyone that I've corresponded with thus far). It was a lot of work to get to that point, but not terrible.

Been interested in doing the same since reading it and meant to bookmark for later!