Do not use profile name in subject line

[Hocuri]

FTR, there is a lot of prior discussion to this, e.g. Subject of emails - #16 by webratte, Random Subject Lines, Subject and Group names · Issue #128 · deltachat/deltachat-core · GitHub, Subject of emails. Then there was a poll, and the result was to go with Message from <sender name>: [Vote + discussion] First chat message subject

@link2xt

One way would be to put the first line of the message there, basically the same text as we put into summary of the chatlist item.

We had this in the past (prefixed with Chat: ), and people didn’t like it.

Two possible ideas to only fix this particular issue, without changing everything else:

• In chats with a green checkmark, always set the subject to “Message sent via Delta Chat” (unlocalized). Green-checkmark-chats are never with classical email users, so the subject doesn’t matter as much.
• Or: In encrypted chats (which mostly are with DC users, but sometimes with classical-MUA-users), use “Message sent via Delta Chat” as the initial subject line, instead of “Message from Bob”. Then, reset the subject line if SubjectTimestamp is older than a few weeks, so that the old subject doesn’t stay forever.