>The thing is, I want to filter file attachments with different extensions. 
>Some extensions filter fine but others do not. In those cases where the 
>file is not filtered, the incoming email message does not contain the 
>actual attached file, but its contents are displayed in the message body 
>as plain text. The extensions that do not filter are: .v bs .b at & .s hs

My guess would be that when those files are sent, they are not being sent 
as actual attachments, but instead sent as part of the body of the 
E-mail.  In that case, there would be no name to the attachment (since 
there would really be no attachment).

If you want, you can send a copy to virustrap@ declude.com , and then 
E-mail me to let me know, and I can check the raw MIME headers to see what 
is happening.

                                                    -Scott
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Declude: Anti-virus, Anti-spam and Anti-hijacking solutions for 
IMail.  http://www.declude.com

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[This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)]


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