[Mimedefang] How to discard mail silently when it contains bad attachments

[-ray]

On Fri, 12 Sep 2003, Ole Holm Nielsen wrote:

> In 
> http://lists.roaringpenguin.com/pipermail/mimedefang/2003-August/007540.html
> it is suggested to drop .pif and .scr attachments by this code:
> 
> >      # drop all pif messages -zrd 8/19/2003
> >     $drop_exts = '(pif|scr)';
> >      if (re_match($entity, $drop_exts)) {
> >          md_graphdefang_log("SLU dropping file $fname from $RelayAddr");
> >            return action_discard();
> >     }
> 
> As I discovered, that code will discard any attachments whose name
> contains the substrings "scr" or "pif".  We have dropped the following
> attachments erroneously today: descr.doc, manuscript.doc.  Bad, bad !

I noticed that soon after implemented the code.  Sorry i forgot i posted 
that to the list.  I changed it to:

    # drop all pif messages -zrd 8/19/2003
    $drop_exts = '(pif|scr)';
    $drop_re = '\.' . $drop_exts . '\.*([^-A-Za-z0-9_.,]|$)';
     if (re_match($entity, $drop_re)) {
         md_graphdefang_log("SLU dropping file $fname from $RelayAddr");
           return action_discard();
    }

Which works a lot better but i found it will also catch things like 
somefile.pif.txt, which is probably not the best way either.

ray
-- 
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Ray DeJean  				       	 http://www.r-a-y.org
Systems Engineer                    Southeastern Louisiana University
IBM Certified Specialist  	      AIX Administration, AIX Support
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