Author: Eugeny N Dzhurinsky Date: To: exim-users Subject: [exim] tracking messages in message threads with custom header
Hello, all!
I have some strange task to be solved - I need to have a way to inject some
header into the e-mail to be delivered locally in case if this e-mail was in
response of threads I am started, replied or just interested in.
I can think in this way:
1) there needs to be a database of message-id values for messages to track,
may be SQL database or just text file
2) when the message is processed by exim and this message is being sent from
some address (my address for example), the generated message-id is saved by
exim into that database
3) for all incoming messages the in-reply-to header is checked against the
database of message ids, and if there is such id existing in the database
- then add custom header (for example 'carbon-copy: yes') to the message and
deliver it to be handled by procmail etc. Also store the message-id of the
message into the database of message-ids to allow tracking the follow-ups of
the messages
This way it should be possible to "watch" threads in mailing list and receive
instant notifications about new replies.
For now the question is - is it possible at all to do so? How can I tell exim
to write certain header into a file or database? How can I check the presence
of the value of the header of a message in that database and then add the
custom header?
May be the task I described above is already solved in exim and I just need to
add some configuration settings?
