Hey admins!
There's a major issue in stock 1.6 that requires that you make some changes to ActivityPub, as suspended users' messages are not being properly rejected. This includes domain blocks.
To fix it, run git cherry-pick against this commit and restart:
https://github.com/tootsuite/mastodon/commit/b9d241c6f554570e0677d9354b27dad21322e341
Hey admins!
Here's some very straightforward instructions if you're not intimately familiar with git (pff, like anyone is):
1. go to the base directory of your project
2. run "git fetch"
3. run "git cherry-pick b9d241c6f554570e0677d9354b27dad21322e341"
Then, the next time you update, make sure you run "git pull --rebase v1.#.#" so your git history doesn't get ruined compared to the official branch