Exchange/Outlook Specific Settings?

Martin.Hepworth martinh at
Wed Mar 28 10:15:28 CEST 2007


You'd be surprised how many times the "dangerous content" scanning has
stopped .exes etc getting through,  that 3-4 hours later start getting
marked as malware ridden....

Normally we seem to be at the forefront of any outbreak (I guess we're
just lucky!), this has saved my bacon many times in the last year.

Yes I too have a diverse user base, with developers spread over many
sites and test code going out to customers/suppliers all the time. But
the small amount of time it takes for me to release valid stuff is more
than covered by the time we save with viruses NOT getting on the user's
machine using this setting.

YMMV of course - but you know that, you work for MIRA ;-)

I've got a similar environment to yours (no MS-Exch, but similar) and do
things the same way, with the MTA doing valid address look ups which
drops well over 50% of traffic to start with.

In fact here's some scary stats from one day last week!

Total Incoming: 17,000
Of these.
Unknown recipient: 9,000
Rejected due to delay/syntax errors:3,000
Deleted due to spam:4,000
Valid: 1,000

Martin Hepworth
Snr Systems Administrator
Solid State Logic
Tel: +44 (0)1865 842300
> -----Original Message-----
> From: mailscanner-bounces at [mailto:mailscanner-
> bounces at] On Behalf Of Paul Hutchings
> Sent: 27 March 2007 18:06
> To: MailScanner discussion
> Subject: Exchange/Outlook Specific Settings?
> At the risk of setting myself up for a fall, after printing out the
> manual and working my way through MailScanner.Conf I now appear to
> a working Postfix + MailsScanner setup.
> For now it's sat on the LAN and is simply handling a few test
> The intention is ultimately to have this configuration in our DMZ
> handling mail to/from our internal Exchange server.
> So, given the environment which is 99.9% Outlook sending through
> Exchange which smarthosts to the relay box, are there any suggested
> tweaks to MailScanner?
> I tend to do most of my attachment filtering via Postfix mime header
> checks and given how diverse our userbase is I have disabled
> Content Scanning" but will be doing virus and spam scanning on inbound
> mail (outbound will only be virus checked).
> cheers,
> Paul
> --
> Paul Hutchings
> Network Administrator, MIRA Ltd.
> Tel: 44 (0)24 7635 5378, Fax: 44 (0)24 7635 8378
> mailto:paul.hutchings at
> --
> MailScanner mailing list
> mailscanner at
> Before posting, read
> Support MailScanner development - buy the book off the website!

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