Hi!
Yesterday I suggested that it yould be useful to additionally consider
the message-ids of the "In-Reply-To" or "References" headers for the
penpals feature.
I've now done a small patch that implements that behavior. (Attached.)
It uses the Message-Ids of the "References" header of an incoming mail
to search for matching outgoing mails that this mail is a reply to.
Of course parsing of the Reply-header could be improved but it's just a
quick proof of concept.
The Message-Ids of previously outgoing messages are only considered if
they were:
- not a spam, virus, etc. (clean) (content='C') and
- if there is at least one recipient with deliver status 'P' (passed)
and who isn't the sender
-------------------- snip! --------------------
'sel_penpals_msgid' =>
"SELECT msgs.time_num, msgs.mail_id, subject".
" FROM msgs".
" WHERE sid=? AND msgs.message_id=? AND content='C'".
" AND EXISTS (".
" SELECT 1 FROM msgrcpt".
" WHERE msgrcpt.mail_id = msgs.mail_id".
" AND msgrcpt.rid <> msgs.sid AND ds='P' )".
" ORDER BY msgs.time_num DESC LIMIT 1",
-------------------- snip! --------------------
When doing penpal checks, both lookups (first based on sender and
recipient-adresses and second based on the recipient of the incoming
mail and on the message-id) are done and the result with the highest
timestamp is used if both are successful.
I believe that this could be an important feature because the current
penpal-feature misses one case that is quite common in practice:
You send out an email and the recipient replys with a different address.
(E.g. you send the email to "[EMAIL PROTECTED]" and the reply comes
from "[EMAIL PROTECTED]" or from "[EMAIL PROTECTED]" or ...)
I hope you'll find it useful and maybe consider it for future inclusion.
Cheers,
--leo
P.S.: Maybe there should be an index on msgs.message_id if this feature
is enabled.
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