Re: [Exim] system_filter.exim

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Author: S. Joel Bernstein
Date:  
To: Exim Users
Subject: Re: [Exim] system_filter.exim
Of course, one view is that a responsible ISP should expect responsibility
from its users. I would say that taking inadequate precautions to protect
yourself from virus-emails would be a responsible thing to do. Forward the
mail to their ISP and they could conceivably be expected to warn the user or
even terminate their account.

I don't hold this view myself to this extent, but stupidity isn't a great
defence...

Joel
----- Original Message -----
From: "Dave C." <djc@???>
To: "Nigel Metheringham" <Nigel.Metheringham@???>
Cc: "Odhiambo Washington" <wash@???>; "Exim Users"
<exim-users@???>
Sent: Friday, May 25, 2001 5:50 PM
Subject: Re: [Exim] system_filter.exim


> On Fri, 25 May 2001, Nigel Metheringham wrote:
>
> >
> > wash@??? said:
> > > How does the filter compare to a commercial virus scanner?
> >
> > Its not a virus scanner. It catches a couple of easy virus header
> > signatures and it looks for particular MIME types. It does *not* scan
> > content, look in attachments or look at more than the first few
> > kilobytes of the message. If you have a system vulnerable to viruses
> > then you should think of additional protection.
> >
> > It does kill off most of the mail worms seen to date quite nicely.
> >
> >
> > wash@??? said:
> > > Why does it not insert the sender of the message, but rather just
> > > gives <>???
> >
> > The probelmatic message was formatted as a bounce message - there is no
> > sender information to add.
>
>
> Yes, there is a certain well-known virus (Snow White and the 7 dwarves)
> virus which propogates by sending messages from the null sender.
>
> If you look at the original message, it should have the IP address that
> it came from. It may be satisfying to you to find out what ISP's address
> that is and forward it to them. Not that they are likely to do anything
> about it. Once can protect one's own users from these viruses to a
> limited extent, but its really quite futile to try and cure the entire
> Internet of them.
>
>
> --
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