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Date: Wed, 28 Nov 2001 05:53:13 +0200
From: Antti Tolamo <[EMAIL PROTECTED]>
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Subject: Re: Filtering e-mail from outlook users
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Michael Cobb wrote:
> Folks,
>
> I have a customer who has asked the "best" way to filter, remove, not
> accept and or disallow ALL e-mail sent to their domain from ALL users
> of outlook regardless of version.
I think this is a question that goes more to area of mailservers
than firewalls.
>
> The key word here is "best" way. These people want ALL e-mail sent by
> anyone running an outlook client wacked and they also want a message
> sent back to the user explaining the reason for the bounced mail.
> Quite frankly, I applaud their decision but let's not debate the "why do
> the want to do that" when we all know the answer to that question.
>
> Regards
>
> Michael
I don't know what is the best way, but I don't
think one can stop mails coming from outlook
clients except by filtering messages by the headers
outlook clients create to messages. One
needs to just know some headers and strings that all outlook
clients create and which are specific to the outlook clients.
With some knowledge of some good
and flexible mailserver(like Sendmail or
Exim in Unix/linux) , making filter that spots
outlook produced message by headers, destroys the message and
sends a preformattted message to senders address isn't
a big feat. Learning such mailserver and it's filter language
isn't a days job, but certainly worth of it learning. If
I can recommend, I think Exim is quite easy mailserver because
it uses quite easily understandable syntax and configuration
files among mailservers. But there are other which can
it do.
Don't know how it is done in WIndows world, though.
Antti
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