> For instance, if i have two subfolder in the INBOX. Is it possible > that the same UID of message appeared in both of the two folders. > In another word, the sequence number based on folder or mail account? Folder, a believe the uniqueness of the UID is to the folder scope. I remember once seeing something about the ability to generate UUIDs [was that Cyrus or something else?] but I don't know how to turn that on/off. > I wanna do some archiving operations on the filesystem level. Ugh, I'd advise against it. Why not do them on the 'protocol' level? That certainly makes the archives easier to use. > So i have to deal with the message files stored in the mailboxes. -- OpenGroupware developer: awilliam@xxxxxxxxxxxxx <http://whitemiceconsulting.blogspot.com/> OpenGroupare & Cyrus IMAPd documenation @ <http://docs.opengroupware.org/Members/whitemice/wmogag/file_view> ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html