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imapsync/FAQ.d/FAQ.Use_addheader.txt

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#!/bin/cat
$Id: FAQ.Use_addheader.txt,v 1.1 2016/06/01 12:25:56 gilles Exp gilles $
This documentation is also at http://imapsync.lamiral.info/#doc
============================================
Imapsync --addheader suggestion.
============================================
=======================================================================
Q. What means this log message:
"Host1 Sent/1234 ignored (no wanted headers so we ignore this message.
To solve this: use --addheader)"
R. In order to sync messages from one account to another Imapsync has
to identify messages on both sides, and compare them.
Imapsync can use two completely different methods to identify
messages on each account.
The first one, the default one, uses some headers of messages,
Real world syncs with various imap servers have bring to use
two headers "Message-Id:" and "Received:". It works for most
messages except for special folders like Sent or Draft where
messages in those folders don't have "Message-Id:" nor
"Received:" headers.
Here comes -addheader option. Option --addheader adds
a "Message-Id" header consisting of the imap UID of the message
on the host1 folder, like "Message-Id: 12345@imapsync".
This way, messages are well identified on both sides.
=======================================================================