Two things that I would like in Celeste:

1. Some form of tracking of "read messages", color changed or whatever.
2. Threading. Also, I have noticed that Celeste doesn't send
"in-reply-to" and uses 'X-Mailer' instead of 'user-agent' (read
somewhere that X-Mailer is deprecated or something). But that is very
easy to fix of course.

Before I start fiddling with this, has anybody already done this or do I
have "everything" if I do an update?

regards, Göran