No. Let's Encrypt was a fairly new addition. Previously I was using self-signed certs that I'd install manually in the client.
But I've been self-hosting mail services for over a decade at this point. It's seen a variety of permutations including some with Sendmail, some with postgres backed lookup tables for virtual hosting, and so-on.
But I've been self-hosting mail services for over a decade at this point. It's seen a variety of permutations including some with Sendmail, some with postgres backed lookup tables for virtual hosting, and so-on.