Zip attachments are unusable when moving an email message
I'm asking this question on behalf of a coworker. Here's the scenario.
Each month we receive a .zip file from one of our vendors. My coworker receives that file, and if she moves the message from her inbox to a different folder (in Apple Mail) the .zip file becomes unusable ... it's displayed as garbled text/code.
If she doesn't move that .zip file it's perfectly normal and usable, but as soon as it moves it's zapped.
Any ideas on what's causing this, and how to fix it?