Andrew Tamm wrote:
For some reason, the X-IMAP field (in particular the first number, the
time stamp) is being rewritten to the current time instead of its
original value. This causes all the messages to have new UIDL values,
and so the POP client thinks that these are new messages. The field in
question is:
X-IMAP: 1213219525 0000000002
Does anyone have any idea why that number would be changing?
SPAM with bogus headers?
We used to have this problem when using Unix mailbox format.
Every once in a while a SPAM comes with bogus headers
(X-UID, X-IMAPbase, etc) and the POP3/IMAP server has to
reindex all messages.
POP3 clients will see every message as new;
IMAP clients will reload all headers - they don't see duplicates but
a delay in "refreshing" the Inbox.
The fix is to either switch to mix format and/or filter out incoming
emails with bogus headers
Our procmail filters remove the following headers
^(X-UID|X-IMAPbase|X-IMAP|X-Status|Status|X-Keywords)
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