In light of current events with snarfed.org and brid.gy fiasco, you can use this tutorial to block by yourself both of them even if there is no reachable account on some of these domains:
How to Block Server Domains in Mastodon
Edit: Credit to the author:
@theghostoftomjoad
12ft.io
12ft
@AccurstDemon @theghostoftomjoad
Just putting in the domain didn't work for me, I had to do this: (following https://github.com/mastodon/mastodon/blob/main/spec/fixtures/files/domain_blocks.csv and https://github.com/mstdn/Mastodon/blob/main/dist/domain_blocks.csv):
snarfed.org,suspend,true,false,corporate social media bridge
brid.gy,suspend,true,false,corporate social media bridge
GitHubmastodon/spec/fixtures/files/domain_blocks.csv at main · mastodon/mastodonYour self-hosted, globally interconnected microblogging community - mastodon/mastodon
@kdwarn @theghostoftomjoad thank you, I'll check on that!