Re:AMP for email is a terrible idea
by zamalek on Wednesday February 14, 2018 @01:21PM
(#16377931)
I use Fastmail and I can communicate with everyone just fine. I simply had to follow their instructions for setting up my domain. Without that configuration, near every email provider will reject your mail - for good reason.
... and don't ever write emails to anyone who uses GMail. And tell all your friends who use GMail they shouldn't write emails to you.