maybe federated social networks is one of those ideas best left in the "works better in theory" realm
"it's just like email!" but i don't remember the last time @gmail.com 'MXblocked' @outlook.com based purely on Sundar not liking what Satya said last weekend
@tay try self-hosting email and getting gmail to accept your messages
@noiob all i had to do was set a SPF record