Earlier quoted context omitted.
> throw you off for using the domain to email things they disagree with Right, you can get kicked off for your emails. But nobody is going to ban you based on which domains you do or do not put on your block list.
Modern email most definitely does block domains and distrust unfamiliar ones (I extend my personal guarantee that getting around spam filters will be an issue if you host your own email), and there most definitey are such things as domain restricted email servers. Moreover social media faces distinct issues that require specific tools, causing the email analogy to break down a bit. A lot of organized harassment campa…
Those domains are being blocked because of what they send.
They're not being blocked on the basis of what domains they block. There's no recursive blocking that wants you to take a stance and punishes you for being a neutral acceptor of emails. Those blocks are the behavior that can make federation suck.