[Dovecot] Locking /var/mail/user issue with postfix and dovecot

[Robert JR]

On 2012-10-25 21:23, Stan Hoeppner wrote:

> On 10/25/2012 1:00 PM, Stan Hoeppner wrote:
>
>> Switch Postfix to use the Dovecot Local Deliver Agent (LDA) in place 
>> of
>> the Postfix local/virtual delivery agent. Using Dovecot LDA 
>> eliminates
>> the file locking issue. Thus it also increases throughput as lock
>> latency is eliminated. It also enables using all the Dovecot 
>> delivery
>> plugins such as Sieve, Quota, anti-spam, etc.
>
> I forgot to mention one very important feature of Dovecot LDA:
>
> New messages delivered by Postfix are indexed by LDA as they are 
> written
> to the mailbox, flags updated at this time, etc. Thus when a mailbox 
> is
> opened in an IMAP MUA, new messages are displayed instantly (I don't 
> use
> POP but it's probably faster as well). With your current setup it can
> take from a few to many seconds to show new mail, depending on 
> message
> count. With LDA new message count seems to have no impact on the 
> speed
> of display.

Thanks stan very much for your detailed answer, i will read about LDA 
to
know how it works. But i still wonder why this mailbox locking issue 
and I
hope for my referece some one at this form explain to me the issue 
reason.
as since postfix,dovecot has the same lockign settings so why this 
issue
happen ? I have spend 3 days searching for an answer and i couldnot 
find
any.. I think only Timo can answer my question...

Thanks again stan