Last September when the Blackberry Internet Service started using
the IMAP IDLE command, we were one of the sites reporting issues with
those users not having their MIX mailboxes burped.
We applied the patch to do mail checkpoint during the IDLE loop,
and I could confirm through my own tests that the server was now
doing checkpoints during IDLE and reclaiming disk space.
The problem is that we still had BIS users who are unable to delete
messages and get back disk space. I had just assumed that these users
had their Blackberry's configured to not use IMAP IDLE, or some other
incorrect setting.
I finally got my hands on a BB device and traced the associated
IMAP server to see what was happening. I've determined that the
Blackberry's use the EXAMINE command (not SELECT) to open the user's
INBOX, and then issues the IDLE command.
Now, whenever a checkpoint tries to take place, the server sends an
untagged response:
* OK Checkpoint ignored on readonly mailbox
As long as this imap process from Blackberry Internet Service remains
in its EXAMINE/IDLE loop, it seems that no other process expunge the
mailbox and have burping take place.
Does anyone have any advice on how I might deal with this? I do not
see any obvious settings for the Blackberry to fix and I'm not sure
if I'm missing something obvious.
--
David A. Halsema E-mail Administrator
Purdue University [email protected]
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