MailScanner slowwing down

Thu Apr 30 17:28:03 IST 2009

When you install smf-sav, there's a config file you'll need to edit slightly.  You specify your Exchange server, and it will query it.  The conf file is also where you can white/blacklist specific addresses, domains, etc.  It is fairly efficient, as it caches the results so that it's not asking the Exchange server about every message.  I think the TTL is 3 hours, but it can be changed as well.

Another good milter to add is smf-spf.  Grey-listing and greet-pause are also very effective in reducing inbound noise.

HTH...

...Kevin
--
Kevin Miller                Registered Linux User No: 307357
CBJ MIS Dept.               Network Systems Admin., Mail Admin.
155 South Seward Street     ph: (907) 586-0242
Juneau, Alaska 99801        fax: (907 586-4500

________________________________
From: mailscanner-bounces at lists.mailscanner.info [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf Of Mail Admin
Sent: Thursday, April 30, 2009 6:29 AM
To: 'MailScanner discussion'
Subject: RE: MailScanner slowwing down

Martin, sorry for bothering you, but is there a description on how smf-sav actually works. How does it check the recipient of my domains? Does it know somehow  how to get to the exchange server for each domain>? I cant find any descriptions on the workings?

Thanks a lot

From: mailscanner-bounces at lists.mailscanner.info [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf Of Martin Hepworth
Sent: 30 April 2009 12:27
To: MailScanner discussion
Subject: Re: MailScanner slowwing down

Hi

you need to do a lookup on each address rather than keeping it a file you have to maintain - smf-sav can do this quite easily although it's main purpose it to check senders it can also check recipients

http://smfs.sourceforge.net/smf-sav.html

--
Martin Hepworth
Oxford, UK

2009/4/30 Mail Admin <mailadmin at midland-ics.ie<mailto:mailadmin at midland-ics.ie>>

The unknown recipients would solve a lot of the problems.

I'm not sure if I can get my head around this though.

The Server has some local domains with pop3 and the big domains I relay on to their Exchange Server.

I'd love to put all the valid exchange users in a file and allow the system to only accept for thes valid addresses, but is there an easy way?  So my exchange domains I lookup a file of addresses and other local I use the access file?

Thanks

From: mailscanner-bounces at lists.mailscanner.info<mailto:mailscanner-bounces at lists.mailscanner.info> [mailto:mailscanner-bounces at lists.mailscanner.info<mailto:mailscanner-bounces at lists.mailscanner.info>] On Behalf Of Martin Hepworth
Sent: 30 April 2009 10:26
To: MailScanner discussion
Subject: Re: MailScanner slowwing down

See

http://wiki.mailscanner.info/doku.php?id=maq:index#optimization_tips

and

http://wiki.mailscanner.info/doku.php?id=maq:index#getting_the_best_out_of_spamassassin

Dropping unknown recipients and having a local caching nameserver are generally the first things to sort, then look at the number of children and batch size...

--
Martin Hepworth
Oxford, UK

2009/4/30 Mail Admin <mailadmin at midland-ics.ie<mailto:mailadmin at midland-ics.ie>>

Hi All,

Recently I am finding that the amount of incoming mail through my MailScanner Server  is really slowing down things.  There is a heavy load now since I took on a domain that seems to me well spammed. Yesterdays processing processed 22,000 emails @88% Spam approx.

Server Spec POWEREDGE 1850 XEON 2.8GHZ/2MB 800FSB - WITH 2 GIG RAM and RAID 1  Configuration on two Disks RPM 10K... Its Running Fedora Core 5, Send Mail 8.13.8-1.fc5 with MailScanner 4.69.7-1 with SA, Razor, DCC., MailWatch V1

Its working very well blocking spam, but only in the last couple of days its got really slow.

Any ideas on how to reduce the load on this server>? By blocking mail at the MTA before it hits MS? OR Tweaking my processes?

What do the Experts think on the Server Spec, for the amount of traffic?

I'd appreciate any help

Regards

Kevin

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