Postfix vs MailScanner : Slow Incoming Queue

[ram]

On Wed, 2007-11-07 at 11:05 +1100, R Wahyudi wrote:
> Hi All, 
> 
> We have bunch of postfix server to filter spam for incoming mail.
> These servers sits in front of actual mail server. 
> 
> For some reason mail delivery is slow because email is sitting in
> incoming queue 
> for too long. Most of these files have 0700 permission. 
> 
> I have read http://www.postfix.org/QSHAPE_README.html#incoming_queue.
> In the document it stated that : 
>     
>     "The main factors slowing down the queue manager are disk I/O and
> lookup queries to the trivial-rewrite service. "
> 
> In my case, I think the disk and lookup queries are fast enough.
> Lookup queries is done locally from 
> hash file. I also don't think there is no correlation between disk IO
> utilization and the number of email in incoming queue. 
> postfix spool directory mounted on reiserfs partition with notail and
> noatime. 

Please give more details 
How many mails do you receive per hour , what checks do you at MTA etc.
How many mails really go into hold queue per hour 
What is the delay in mails you are seeing 



Thanks
Ram