PDF to email yields .DAT file?

[Steve St-Laurent]

Out of the blue, a Windows XP SP2 machine that was nicely handling a print PDF and attach to email script is now attaching a file with a .DAT extension, instead of .PDF. Mail client is Outlook. Script has worked perfectly on this machine for more than a year, so I'm guessing it's some Windows or Outlook setting that has changed. The file generated is valid PDF; change the extension and it opens properly. Anyone encounter this?

[Richard Rönnbäck]

This might be relevant

http://support.microsoft.com/kb/278061/en-us

[Steve St-Laurent]

This was indeed the culprit. Setting the default mail format pref to plain text cleared it up. Thanks!