Okay, fairy nuff.
In that case, I would probably start with writing an SMTP or IMAP proxy first. It will teach you everything you need to know about the protocols, and you can reverse engineer the protocols using a client that already works.
It would give you a tangible project outline, which I believe is often critical to not lose motivation or interest.
If you accept using libraries, there’s the imap crate, the mail_send crate, and samotoo crate that are worth looking at.
Interesting that the extra 10° makes such a difference for ASA and ABS.
I recently started printing with ASA in my enclosed MK4. I might have to try this.