CentOS - Jul 2006 - imap flags on uw-imap

I am talking with a client about moving from CentOS 3.7 to CentOS 4.x
and migrating their uw-imap to cyrus-imapd but in the process, would
want to do a clean install. This is problematic in that if I want to
preserve the IMAP flags for all the users INBOX and other mail folders,
I would have to move them to another computer and then use something
like imapsync (which I've used before) to copy the mail and all of the
folders from the old IMAP server to the new one.

I haven't a clue where/how uw-imap stores these flags to even begin to
presume that I can successfully move them (though I suppose I can rsync
the /var/spool/mail and the users folders)...does anyone know where
these flags are stored?

Craig

On 7/30/06, Craig White <craigwhite at azapple.com>
wrote:
> I haven't a clue where/how uw-imap stores these flags to even begin to
> presume that I can successfully move them (though I suppose I can rsync
> the /var/spool/mail and the users folders)...does anyone know where
> these flags are stored?
You can't rsync uw-imap folders to a cyrus install, because they use
entirely different file formats.  Cyrus uses a one-message-per-file
directory hierarchy similar to a usenet news tree, whereas UW by
default uses flat files.  The ONLY thing you can do is imapsync them,
unless cyrus provides some kind of import tool.

That said ... for writable flat-file folders, the flags are stored in
each of the mail messages themselves, in X-Status and similar headers.
 The UIDVALIDITY and other folder-level values are stored in the fake
message with subject "DO NOT REMOVE ..." that is inserted at the top
of each folder.