Bob Davis wrote:

I emailed an MP3 file to a person recently and it was received as a
TMP file. I tried sending other files to him and all were received
with filenames like ATT177.TMP, ATT178.TMP, etc. When he changes the
extension to MP3 the file plays normally. How is the filename being
changed and what is the source of this change, the sending or
receiving computer? I'm sending via Outlook 2000 and he also has
Outlook 2000.

Make sure the sending format is HTML or Plain Text.
--
Brian Tillman [MVP-Outlook]