Actual behavior
Currently there is only sender’s name and first words of message in desktop notification ‘bubble’.
Expected behavior
Add recipient (local) mail account name, like “DeltaChat, X to Y: The message is …”
Ideal solution will be to add customizable template string with substitution, like %a = sender account name; %A = sender email address; %m = message text; %M = full message text, etc.
It will allow to more precise customization of notifications outside of desktop app; also thay may be used as signals for autmated processes (possible with good traditional mail clients, not possible with DC yet).
Or just add the possibility to call the script with args or envvars on new message event.