If you don't store that data or delete it, you can't provide it.
But Signal could store that data because they have access to that dats
But Signal could store that data because they have access to that dats
Can I do this easily and still have my homeserver work correctly with Matrix?
Anyway, the law would probably require any operator to keep this data for a while since they have access to it. And I can't rely on my contact's homeservers to delete this data even if they can (technically and legally).
They have access to that data alone through the fact that they are in control of their servers and, thus, can see who sends and receives messages.
Even on a theoretical level their sealed sender technique doesn't work: https://www.ndss-symposium.org/ndss-paper/improving-signals-...
Now, include lower level technical Details such as the IP layer.
1. Imagine you connect to a server to send a message. Now, you send a message to someone else. The server can't see who you are, right? Because the letter misses your name. Imagine someone else sends a message to you.
2. Imagine you to connect to the same server to receive messages that the server stored for delivery with your name on it. The server gives you the messages.
Do you notice something?
The information can be obtained in an automated way.