What relays allow you to delete posts?
Discussion
"You cannot delete on protocol level, you can just tag a note as deleted. How relays and clients deal with this information is their choice. Eg. clients can choose to not show deleted-tagged notes; relays can actually delete it. However you can never be sure all relays to which your note got propagated do this. Pretty impossible to actually delete your note through the whole network."
There may be some relays, and some clients that honor requests for deletion, but not all. This is why “delete” is really “request to delete” where all parties are not guaranteed to honor this request.