possible sieve/cyrus redirect issue?

[mahecha at jsums.edu]

We use 

Cyrus IMAP4 v2.2.12-Invoca-RPM-2.2.12-8.1.RHEL4
server ready

ESMTP Sendmail 8.13.1/8.13.1; Thu, 28 Feb 2008
09:52:17 -0600

and squirrelmail 1.4


Here is
the issue...
some of my users login to webmail (squirrelmail), send a
message, and a copy is placed in their Sent folder (I can tell is there by
looking directly at the mailstore).

... by the log files I can
tell when the message entered the system, got an id, duplicate check, mark
as Sent, etc.

but the message never made it to the
destination... eventhough there is a "Message accepted for
delivery" log entry.

This problem does not seem to follow
a patern and not for the same user.



Also, part of
the same email message, the log entry below alway show for that user... I
don't know what that means

sendmail[24713]: m1QIIdVB024713:
Authentication-Warning: server.jsums.edu: cyrus set sender to user1 at jsums.edu using -f


One
of the messages were sent to user that is running sieve to redirect; I can
see where the sieve script was contacted, but I can tell were the message
was redirected/resent to the final destination

Feb 26
12:18:39 server lmtpunix[10876]: duplicate_mark: <2815.143.132.199.52.1204049918.squirrel at server.jsums.edu>
.user2+ at .sieve. 1204049919 0


how does the "duplicate_mark" work?

I
understand that some of these issues might not even be cyrus related, but
since you guys know so much, might be able to point me in the right
direction.

Thanks in advanced.
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