Email is still pretty simple. It’s the stuff around email that has appeared for source validating and spam prevention that has complicated it...and really that’

Email is still pretty simple. It’s the stuff around email that has appeared for source validating and spam prevention that has complicated it...and really that’s not any one persons fault. Just people trying to solve a hard problem. SPF, DKIM and DMARC seem to be making a real dent here though. DKIM is the most complicated to implement and manage since ideally you want to periodically rotate the keys and it has to be implemented at the sending server level instead of the DNS.