901
The short answer
(lemmy.zip)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
Actually it does all the time. People running their own email servers would block whole domains because they were spam.
That's a completely different beast, on a personal level people can do whatever they want I can even block domains on my mail rule. The point is using a third party service and not being able to communicate with someone else because admins/owner said so
So I set up an email server for my friends or my hobby train club and decide to ban another email server. Everyone in my club is now screwed. It actually fits better than I originally thought.