Are politicians required to accept all messages from all people regardless of content? If a person sends a package of, say, explicit images, is the politician

Are politicians required to accept all messages from all people regardless of content? If a person sends a package of, say, explicit images, is the politician required to accept and review them? Or any letter they receive? Obviously not. They can take your letter and throw it right in the trash. How is blocking any different? What if it was "quiet blocking", so the sender never knows their message wasn't read or received by the recipient? What if the politician or government doesn't have an account at all on a given site? Doesn't that mean they aren't accepting messages from anyone? Do they have to create an account on any site where any of their constituents may be? You have a right to freedom of speech in the US. As far as I can tell, you do not have a right to have others listen to everything you say, even elected government officials.