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Attachments are turned to DAT & NSF file

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We have a very weird condition, One user sends *.Doc or *.PDF extention attachements and when a user outside of our organization get's them the attachments are turned into a *.DAT extension and in some instances to NSF extension files making them unreadable. User has XP office Pro, we have Exchange 5.5 with trendmicro scan mail for exchange.
Any insight on this would be appreciated.

8 replies

by jennifer.gardner

Have you checked to see that there aren't any e-mail filters active on the recipient's end? Our organization has started renaming *.exe and other attachments due to the rampant virus attacks.

by donna_collette

Turn of the sending in Rich Text format to the receiver experiencing the issues. This is usually done in the properties of the receiver, in the address book. There is a check box to send in Rich Text Format. This check box can cause problems when the receiver is using Lotus Notes. I've seen the check box on the SMPT - General tab, but may be moved with the new versions of Outlook.

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