oal

I'd say that depends on which languages you already know. Go is a smaller language in terms of syntax. No generics, not OO in the sense that it doesn't have classes and inheritance etc. But if you're familiar with the Java ecosystem and languages like Scala, or something like Swift or Rust, Kotlin should be easy to pick up.

I ran my own mail server using OpenSMTPD and Dovecot for a little over a year, and found OpenSMTPD to be very easy to set up and configure. I needed something light, that I could easily tweak to fit my needs. I mostly got things working reading the man files, and asking for help in the IRC channel (thanks Gilles). I also looked into Postfix, and I'm sure it's great, but the amount of configuration options were a bit daunting.

I think the project deserves more contributors and more eyes to look at the code. A fantastic foundation has been laid, but we can't expect Gilles to be able to do it all alone. This is a diamond in the making!