Re: [exim] reject html letters and gif attachments!

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Author: unaos
Date:  
To: Exim users mailing list
Subject: Re: [exim] reject html letters and gif attachments!
very nice to see the example of realisation, if u have for the both
questions please.

2007/3/13, Alexander Shikoff <minotaur@???>:
>
> On Tue, Mar 13, 2007 at 02:27:29PM +0300, Vladimir Koshelenko wrote:
> > Здравствуйте.
> >
> > В сообщении от 13 марта 2007 unaos написал(a):
> > > good morning my dear brothers of spam fighting corps.! :D
> > > now my problem is going panic state - flooded over with spam so making
> > > some cardinal decisions.
> > > and at first - plain text letters only, what will you say. is your
> > > experience showed good results or it's not worth because of users feel
> > > ungood ?
> > > and filter image attachemetns the second.
> > >
> > > i'm using exim 4.62 on gentoo with exiscan and exiscan-acl flags
> enabled.
> > >
> > > how can be that possible and released ?
> >
> > Filtering HTML seems as bad idea. Indeed you can - if you want to loose
> half
> > of mail from outside.
> Sorry for little offtopic. Filtering HTML messages may be a part of
> corporative
> security policy. And it's possible to give 550 error with text like
> 'Only plaintext messages is acceptable' ;)
>
> > Filtefing image attachments is easy. If your Exim built with 'demime'
> check,
> > just add on top of DATA ACL this:
> >
> >   deny
> >       message     = Images not allowed, please zip them before send.
> >       demime      = gif:jpg

> >
> > It helps as emmergency. If you want some advansed spam filtering - read
> Exim
> > manual and this document http://tldp.org/HOWTO/Spam-Filtering-for-MX/
>
> 'demime' is deprecated way to implement filtering attachments
> (
> http://www.exim.org/exim-html-4.66/doc/html/spec_html/ch41.html#SECTdemimecond
> )
> It's recommended to use SMTP MIME ACL instead.
>
> Keep in mind that since exim does not support RFC 2231 yet, neither MIME
> ACL
> nor 'demime' are not filtering efficiently attachments with non-ASCII file
> names.
>
> --
> Kind Regards, Alexander Shikoff
> minotaur@???
> Mob.: +380 67 946 31 49
>
> --
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