Okay .. that sounds good.. Thanks for the infos. I'll try this way :-)
----- Original Message -----
From: "Len Conrad" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, May 07, 2000 10:23 AM
Subject: Re: [IMail Forum] Antivirus for SMTP protocol
>
> >Actually i've downloaded an evaluation version of the Norton one...
Norton
> >AntiVirus 2.0 for Gateways...
>
> also, mcafee has one, www.antivirus.has (trendmicro) has one. In my
> informal monitoring of various mailing list comments, mcafee seems
weakest,
> norton and trend are both good, with perhaps trend being out front a
> bit. I recommend you set up NAVIEG and learn how these pgms work and you
> might find that NAVIEG is sufficient.
>
> There are also 2 or 3 a-v content scanners for Linux and FreeBSD. Some
are
> free, but even when they are not, they are heckuva lot cheaper than the
> commercial big boys.
>
> > I plan to use it on a separated server dedicated to this.
>
> Due to the CPU intensiveness and slowness of scanning content (vs the
speed
> of scanning just headers), a dedicated server is the only way to go for
> anybody with several 1000 emails per day to scan. A dedicated content
> scanner should be "SMTP mail relay". If the av content scanner machine
> goes down, your mail flow is totally blocked, so I recommend that you NOT
> set up the av content scanner on the Internet gateway but "inside", like
this:
>
> 1. IMGate mail gateway (or two) for anti-spam with mail-abuse.org lookups,
> DNS validations of sending servers, and global header filtering (inbound
> and outbound).
> IMGate users are finding that IMGate will reject between 5% and 10% of all
> mail just for MAPS reasons, and even more if you want to get really
> agressive with long pattern lists for header filtering and 3-way DNS
> validations. Forwards all mail to:
>
> 2. anti-virus content scanner. SMTP relay style, capable of ETRN delivery,
> if possible, for downstream mail servers at client sites. forwards to
>
> 3.a Imail machine
> 3.b downsteam mail servers at client sites
>
> If 2. goes down, incoming mail is stored at 1. until 2. comes back on
line.
> It may be possible, when the av scanner machine is down, to have 1.
> fallback and forward directly to 3.
>
> Len
>
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>
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