RE: Attachment blocking

  • From: "Mike Liddekee" <mliddekee@xxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Fri, 5 Sep 2003 11:36:07 -0500

I've never heard of blocking .dat files.  Files I block specifically
based on extension are exe,com,bat,scr,pif,vbs.  This cuts out 99.9% of
the viruses.  Other incoming attachments not following into one of those
gets scanning by the AV.  The winmail.dat file is basically just a text
file and there should be no reason for blocking it.




Mike Liddekee

Network Engineer


Humco Holding Group, Inc.

7400 Alumax Dr. 

Texarkana, TX  75501

Ph:  (903) 831-7808 ext 697


-----Original Message-----
From: Chris Wall [mailto:Chris.Wall@xxxxxxxxxxxxxxxxxxx] 
Sent: Friday, September 05, 2003 10:45 AM
To: [ExchangeList]
Subject: [exchangelist] Attachment blocking

Hello all,


Running Exchange 5.5


    I am running GFI Mail Security and have all .dat files blocked.  I
am experiencing an issue where valid e-mails from other organizations
are being blocked due to winmail.dat files being attached to their
messages.  It is not realistic for me to send them directions to turn
off TNEF to prevent the winmail.dat attachment.  


    Do most of you block .dat files?  If so, how do you overcome this
issue in your organization?  I can not whitelist a specific attachment
through GFI so I am stuck.


   Any ideas appreciated.


Chris Wall

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