Massive queue buildup

Randal, Phil prandal at
Tue Nov 14 10:25:16 GMT 2006

I use milter-greylist-3.0rc7 and only greylist (for a very short period)
senders who are in the SORBS DUL, SPAMCOP, NJABL DYN, and PSBL
If they are on any of those blacklists they probably shouldn't be
sending email to us anyhow, but greylisting gives them the benefit of
the doubt.
And email is a store-and-forward system, not an instant messenger.
A fifteen minute delay is neither here nor there in the full scheme of
Phil Randal
Network Engineer
Herefordshire Council
Hereford, UK 


From: Brent Addis [mailto:mailscanner-bounces at] On
Behalf Of Brent Addis
Sent: 13 November 2006 23:49
To: MailScanner discussion
Subject: RE: Massive queue buildup

greylisting is bad and I will never ever run it. I know of one case
where greylisting has very nearly killed someone. They probably
shouldn't have been using email to do what they were, but thats not the
greylisting adds an unnecessary delay to email, and can quite easilly be
beaten if a spammer sets his mind to it.


From: mailscanner-bounces at on behalf of Damian
Sent: Tue 11/14/2006 12:45 PM
To: MailScanner discussion
Subject: RE: Massive queue buildup

Run a DNS server locally, add more memory/CPU, use Greylisting, process
mail using sender address verification before SA at the postfix or
sendmail level and use RBLs at the postfix or sendmail level.


That should get your server load down to 2.0 or lower to keep up with
your traffic.




Damian Mendoza

Mission Viejo, CA

949 586-2200




From: mailscanner-bounces at
[mailto:mailscanner-bounces at] On Behalf Of Jay
Sent: Monday, November 13, 2006 2:32 PM
To: mailscanner at
Subject: Massive queue buildup


Built my first Mailscanner / Postfix box on Friday due to a Sendmail
meltdown last week-- was forced to throw this box into production early.


It ran fine over the weekend, but today there's a massive queue buildup
when I run an mqueue-- 10K so far and building.


Any idea where to look to sort out where it's coming from?


It's possible the box itself is overloaded, 2 2.4 ghz procs, with a load
average of around 13.


Any guidance would be greatly appreciated.



Jay Chandler

Network Administrator, Chapman University

714-628-7249 / chandler at <mailto:chandler at> 

"Bother," said Pooh as he struggled with /etc/, "it never
does quite what I want.  I wish Christopher Robin was here." -- Peter Da
Silva in a.s.r.


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