Upgrade to Entourage 2004, which can handle long filenames.

Alternatively, zip your files (e,g., using DropZip) and give the zipped
file a shorter name.

In article ,
RJS wrote:

I'm using OSX with Entourage email. Everytime I attach an Excel file it
changes the last half of the names to meaningless characters. Is there a way
to extend the length of file names in my preferences? I'v looked everywhere
for the answer.