Mastodon generally allows you to view content from and interact with users from any other server in the fediverse. These are the exceptions that have been made on this particular server.
Media files from these servers will not be processed or stored, and no thumbnails will be displayed, requiring manual click-through to the original file:
Server
Reason
switter.at
No data from these servers will be processed, stored or exchanged, making any interaction or communication with users from these servers impossible:
