The IMAP command APPEND failed
December 23, 2007 at 4:23 pm | In Mac OS X | 5 CommentsTags: 10.5, error, IMAP, Leopard, Mail
After upgrading to Mac OS X 10.5, I started receiving the following error whenever I tried to move an e-mail message from my Inbox to a folder on my IMAP server:
The message could not be moved to the mailbox foldername. The IMAP command “APPEND” to foldername failed with server error: APPEND failed: Unknown flag: NotJunk.
Apparently, in Leopard the Mail application is no longer compatible with UW IMAP server software.
Rather than try to get Mail to work with UW IMAP, I decided to switch to Cyrus IMAP, since it is supposedly more robust than UW IMAP. Sure enough, that fixed the problem!
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