I wish there was a blacklist option in Matrix/Synapse. We have users from our home servers joining large federations, who kill our synapse servers with FederationStateId requests (as far as I can see)

Ah, that explains it. Fingers crossed that they can bring it back up soon.

See here for updates: https://bsky.app/profile/matrix.org/post/3lxuslbzjuc2t

didnt have they a Cloud(tm) Backup?

see also https://news.ycombinator.com/item?id=45107696