Recommended hardware spec 20000 users

[Randal, Phil]

It all depends on email volumes, and whether you blacklist at the MTA
level (e.g zen.spamhaus.org).

Any idea of those numbers?

We're using two Dell 2950 quad-core, 4GB RAM, CentOS 5.4 x64, sendmail,
with zen blocking 80% to 90% of incoming connections.

5 to 8 million emails per month, in total, 700,000 or getting through to
MailScanner/spamassassin.

Virus scanning using clamd 0.96 and McAfee uvscan 6.0.0.

Load average under 3, CPU utilisation under 50%.

Cheers,

Phil

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Phil Randal | Networks Engineer
NHS Herefordshire & Herefordshire Council  | Deputy Chief Executive's
Office | I.C.T. Services Division
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Tel: 01432 260160
email: prandal at herefordshire.gov.uk

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-----Original Message-----
From: mailscanner-bounces at lists.mailscanner.info
[mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf Of Neil
Wilson
Sent: 22 April 2010 15:29
To: MailScanner discussion
Subject: Recommended hardware spec 20000 users

Hi guys,

I need some advice please,

What are your recommendations for hardware for a server that does Spam
scanning with SA, Clamav scanning, running postfix under Centos 5.4 and
logs in mysql and then forwards the emails on to an Exchange server for 
+-20000 users?

The emails theoretically have some basic spam scanning done before they
get to the Linux server however there will still be a large amount of
junk email to get rid of before passing it on to Exchange.

There is currently a dual proc dual core Xeon server with 512MB of RAM
running amavisd, clamd and postfix handling the email at the moment, but
this is very outdated and lacking functionality so it needs to be
upgraded asap.

Would the current server handle the load with just a large RAM upgrade,
EG: 4-8Gigs?

Any advice will be appreciated.

Thanks.

Regards.

Neil Wilson.

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