I'm glad to hear that.

I would allow anything that has a p-tag mentioning me. This however allows spammers to simply address me, just like they do with email. So there needs to be at least an option to only allow senders who are on my latest contact list (which the relay should have, so it shouldn't need to be a list in a config file). I would prefer not to turn on that option, but in that case there needs to be ways to block spam based on filters and modest proof-of-work [probably not paid accounts since nobody is going to pay just to send me a message, are they?]