> so do you use spam blocking on your email server?
Of course, but you're setting up a false dichotomy.
First of all, the problem with spam is less about what is said than about the methods used. Providing information about a mattress sale doesn't violate my rights. Abusing my resources (bandwidth, disk space, time and attention) in order to push your marketing message does.
Secondly, I'll say it again for the people in the back. You have a right to say anything you want. I do not have an obligation to listen. This seems to be the distinction you're blurring. Blocking your messages from entering my server does not violate your rights. Shadowbanning your account on your server (or on a de facto public square) does. Putting your server on a global shared blocklist does. Freezing your bank account because you said the wrong thing, or throwing you in a gulag for three years without due process because you attended the wrong political protest ... does.