If encryption is not possible means the receiver has no Delta Chat installed. In this case Delta Chat on sender side should ask for a Subject.
In principle also for normal chats the Subject could be used optional like a topic for specific chats.
If encryption is not possible means the receiver has no Delta Chat installed. In this case Delta Chat on sender side should ask for a Subject.
In principle also for normal chats the Subject could be used optional like a topic for specific chats.