Stop incoming mail if message queue exceeds set value

[Gordon Colyn]

Thanks, have implemented these already.  The issue is not on the load, the
load stays pretty under control.  I just want to stop accepting mail on the
1 server so the mails are forced to go to the other servers, i.e. 1000
messages handled by 4 servers will be quicker than 1000 mails handled by
1...

 

-----Original Message-----
From: mailscanner-bounces at lists.mailscanner.info
[mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf Of Gary
Pentland
Sent: 27 April 2009 12:47 PM
To: 'MailScanner discussion'
Subject: RE: Stop incoming mail if message queue exceeds set value

Hi,

Look here...

http://www.sendmail.org/m4/tweaking_config.html

Particularly these...

confQUEUE_LA QueueLA [varies] Load average at which queue-only function
kicks in. Default values is (8 * numproc) where numproc is the number of
processors online (if that can be determined).

confREFUSE_LA RefuseLA [varies] Load average at which incoming SMTP
connections are refused. Default values is (12 * numproc) where numproc is
the number of processors online (if that can be determined).

confDELAY_LA DelayLA [0] Load average at which sendmail will sleep for one
second on most SMTP commands and before accepting connections. 0 means no
limit. 


But a few others might be of use.  Be sure you're rejecting invalid
recipients during the SMTP dialouge and not at some stage later.  It sounds
obvious but can easily be missed and result in 1,000s of messages from a bot
being queued and work being done on them, reject these before you queue
them!

Regards,

Gary


mailscanner-bounces at lists.mailscanner.info wrote:
> I am running a round robin dns mail solution with 4 mailscanner 
> servers accepting mail.  The problem I am having is that on occasion 1 
> of the servers gets hit with massive volumes over a very short time so 
> the queue can grow to 5000+ in a matter of minutes causing mail 
> delivery delays on that specific server.  I would like to be able to 
> set a limit on the queue size so that the server stops accepting mail 
> until the queue drops below that set value.
> 
> I have tried with sendmail creating 2 cf files but can't get it 
> working. Does this have to be managed by mailscanner, r can it be done 
> in sendmail?
> 
> Currently using sendmail-8.14.1 and Mailscanner 4.63.8
> 
> Thanks
> 
> 
> Gordon Colyn
> Office : 086 123 ITNT (4868)
> Cell : 083 296 7534
> Fax : 086 520 0885
> InTheNet Technologies
> www.itnt.co.za
> MSN:gordoncolyn at hotmail.com
> SKYPE:gordoncolyn <skype:gordoncolyn?call>
> 
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