-[Subject of emails] Unencrypted messages already mention|
-[Subject of emails] https://delta.chat in the body (footer).|
-[Subject of emails] Using the subject as in these examples, by default,|
-[Subject of emails] can be a nice way to provide a chat view|
-[Subject of emails] even to classic MUA users.|
And supporting a separator like...
E-mail body:
And supporting a separator like… -
(minus) would already allow the user to manually specify the subject and write a classic email in the messenger (in the same way received subjects are shown). See this thread for further details: Subject and Group names · Issue #128 · deltachat/deltachat-core · GitHub
(PS: The references
header (already used) or possibly in-reply-to
is there to allow for the proper grouping of the messages in classic MUAs. So there is no need to rely on (fixed) subject texts.)