[Dovecot] cannot update mailbox - unable to lock for exclusive access

[Ben Morrow]

At  3AM -0600 on  8/11/12 you (Stan Hoeppner) wrote:
> 
> 1.0.7 is absolutely ancient and no longer officially supported.  You
> need 1.2.x minimum, 2.x.x even better.  And you say you just recently
> upgraded your Linux distro?  What planet do you live on son?  You're a
> few light years behind current stable software.

[A light-year is a measure of distance, not of time.]

> LDA completely eliminates lock contention.

As we have discussed before, using the LDA does not prevent lock
contention, it just prevents the problems that arise when different
software is using different locking strategies on the same mailbox
(assuming nothing except LDA and imap is touching the mailbox directly).

There are valid reasons for not using the LDA: the OP might be already
using procmail, for instance, and have users with procmail recipies
which sort into IMAP folders. These folders will need to be locked by
procmail even if the default delivery to INBOX is changed (globally) to
happen through dovecot-lda. While migrating to sieve (and mdbox, and
LMTP) would, IMHO, be the best long-term solution, this isn't necessarily
something that can be set up overnight.

Ben