Fri, 10 Apr 2026 05:02:45 +0000 https://bugs.horde.org/ticket/5296 Unavailable mailboxes shown as empty We are using Cyrus IMAP in a "murder" configuration. Occasionally, one of the backend servers will go down while the frontend servers remain up. The IMAP transaction looks like this: $ openssl s_client -connect mail:993 -quiet depth=1 /C=US/O=Equifax/OU=Equifax Secure Certificate Authority verify return:0 * OK cyrus-frontend-host Cyrus IMAP4 Murder v2.2.12 server ready a01 LOGIN testuser password a01 OK User logged in a02 SELECT INBOX a02 NO Server(s) unavailable to complete operation a03 LOGOUT * BYE LOGOUT received a03 OK Completed read:errno=0 So the login succeeds because authentication is done on the front-end, but the INBOX is unavailable because it's on the down backend. IMP should be able to catch the "server unavailable" message and pass it back to the UI instead of showing an empty mailbox. Users currently panic, thinking that their mailbox has been wiped, when in reality their backend server is undergoing maintenance (or it's broken, but their mail will be back when the server comes back up). Tue, 24 Apr 2007 02:10:05 +0000 https://bugs.horde.org/ticket/5296#t32175 I would classify this as an enhancement rather than a bug. Tue, 24 Apr 2007 10:05:43 +0000 https://bugs.horde.org/ticket/5296#t32191 I'm unaware of a way to get that "server unavailable" message from c-client. Your best bet may be to get murder to issue an IMAP ALERT instead of just the "No". Sun, 13 May 2007 03:59:09 +0000 https://bugs.horde.org/ticket/5296#t33013 > I'm unaware of a way to get that "server unavailable" message from > c-client. Your best bet may be to get murder to issue an IMAP ALERT > instead of just the "No". Perhaps. However, if you set imap_closeonerror, imap_open() will fail instead of simulating an empty mailbox, i.e., the mailbox won't be halfopen. Another option might be getting the error from mm_log(). Sat, 09 Jun 2007 00:26:08 +0000 https://bugs.horde.org/ticket/5296#t33966 > Perhaps. However, if you set imap_closeonerror, imap_open() will > fail instead of simulating an empty mailbox, i.e., the mailbox won't > be halfopen. Another option might be getting the error from mm_log(). Good info, thanks. Unfortunately, unless I'm missing something all of those options would require changes to PHP, not just to Horde. Mon, 11 Jun 2007 15:01:07 +0000 https://bugs.horde.org/ticket/5296#t33974 I don't see a way to make this happen until there's a new imap library. Fri, 25 Jul 2008 02:45:55 +0000 https://bugs.horde.org/ticket/5296#t47781