@mikalai good point! The first years we had to make do with classic email servers. We barely expected anything else than "send message" and "receive message" to work. There was no way to get big email providers to change anything. When we then went for the #chatmail concept it meant the server doesn't need to do anything than to transport the message. No metadata, no rooms, no group state that most other messengers keep on their servers. Crossing out server state makes #deltachat p2p-ish