MailScanner Digest, Vol 20, Issue 49

Gareth list-mailscanner at
Tue Aug 21 18:07:51 IST 2007

well clamscan is much slower than either the clamavmodule or clamd versions
so changing to one of those should help speed it up considerably.

Also you are running 0.90 version of clamav which has a bug causing it to
take much longer to load its signatures which makes the clamscan method even
slower again.

Upgrading clamav and switching to clamavmodule will probably double your
scanning speed easily.

> -----Original Message-----
> From: mailscanner-bounces at
> [mailto:mailscanner-bounces at]On Behalf Of Culley
> Morrow
> Sent: 21 August 2007 17:37
> To: mailscanner at
> Subject: RE: MailScanner Digest, Vol 20, Issue 49
> Thanks for the replies. This server is quite meager with 256mb RAM and a
> 30gb hard drive, all running on a 4 year old Dell desktop. Meager
> is putting
> it mildly. I've got to make it work while it's in place, a massive
> replacement is in the works though.
> Clamscan was what I was meaning actually. I remember reading a
> while back in
> the archives that it was a major stumbling point with new
> versions on older
> systems. After an update it was running OK, but slowly getting further and
> further behind in the mail delivery.
> Anyway, I'll start digging through the wiki for better rules and
> see what I
> can start filtering out.
> ~={o}=~
> Culley Morrow
> IT Manager
> Geneva Woods Pharmacy
> -----Original Message-----
> Message: 11
> Date: Tue, 21 Aug 2007 09:55:06 +0100
> From: Greg Matthews <gmatt at>
> Subject: Re: New Clam, Old, Mailscanner, Ancient Kernel
> To: MailScanner discussion <mailscanner at>
> Message-ID: <46CAA86A.4060206 at>
> Content-Type: text/plain; charset=windows-1252; format=flowed
> Culley Morrow wrote:
> > Ill list out the software versions below and I need a bit of
> assistance
> > making them work for now. I know all I need to do is upgrade the kernel
> > to 2.6 and it all works, but Id like to get them functioning As-Is
> > and then do the upgrade so I have something working to fall back on.
> > Clam AV is currently shut off since clamd as a service was so slow.
> kernel upgrade probably not very important. As others have pointed out,
> there is little reason not to upgrade MS and SA. Stick as much memory in
> the box as it can handle.
> > Kernel 2.4.18-bf2.4
> >
> > Mailscanner 3.27.1-1
> >
> > Clam AV 0.90.1-3etch3
> >
> > Spam Assassin 2.64-1
> >
> >
> >
> > Currently we are inundated with mass spam and I need to get some AV in
> > place, be it Clam or another GNU/GPL/free as in beer-ware. I need a
> > hand here if anyone wants to chime in.
> if you are "inundated" then the best start you can make is to reject as
> much as possible at the MTA. As this is Debian, your MTA is probably
> (but not necessarily) exim. Look at putting in a single well regarded
> block list at the MTA, something like but do your
> research and find one that /you/ like the look of (block list
> preferences can start flame wars!). Make sure you are rejecting mail at
> the MTA for all unknown recipients and not accepting then bouncing. Set
> up your MTA to throttle incoming mail so it doesnt get overwhelmed or
> let your incoming queue build up uncontrollably.
> Visit the MS wiki for tips on how to do this - dig deep, it can be a bit
> tricky to find what you are looking for. Search the archives for good
> links into the wiki.
> --
> Greg Matthews           01491 692445
> Head of UNIX/Linux, iTSS Wallingford
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