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9.25. Attach Plus is attaching winmail.dat files

Symptoms

Attach Plus appears to be attaching a 'winmail.dat' file to outgoing emails.   This often causes problems when the recipient is on a Mac.

Resolution

Attach Plus isn't the one attaching the 'winmail.dat' file to the outgoing email.   Basically, that is Outlook doing strange things.   This Microsoft article describes what is happening:   http://support.microsoft.com/kb/278061.

The suggested resolution is to change mail format to either HTML or Plain Text.