Stop incoming mail if message queue exceeds set value

[Eduardo Casarero]

2009/4/27 Gordon Colyn <gordon at itnt.co.za>:
> 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...
>

milter-limit? http://www.milter.info/sendmail/milter-limit/ this
milter responses with a 451 xxxx when the amount of N emails in M time
is reached, example when you have recieved 1000 emails in less than 5
minutes sendmail starts answering with 451 (while the 5 minutes are
not complete) so the traffic should go away to other box.


>
>
> -----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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