Guys, Here is your answer.

The 8125 or MDA maintains a copy of whatever is currently on your Pop server. If when you get your e-mail, you delete it off the server, the next time the 8125 checks, there is no e-mail so everything on the PDA is deleted.

The answer is to leave a copy of the e-mail on the server. It's that simple.

I manage my Pop account from my PC and keep my master copies there. Only when I download to my PC do I remove the copy from the server. Anything I want to keep on my PDA, I leave on the server.