Windows Phone Thoughts: Mobile Device Spamming: What's the Solution?

We've talked about this issue before, but I wanted to focus more on it. Lately I've been using my SPV (Microsoft Smartphone) to check my Pocket PC Thoughts email. I have to say I'm totally addicted! The size and one-handed operation, for me, is light years beyond checking email on my Pocket PC. The problem is the spam. SO MUCH SPAM! 8O I'd estimate that a full 25% of my PPCT email is spam, and it's much worse on my main email address (over 50%). In this regard, I suppose that the silly limitation that the Smartphone has of only having one email account seems like somewhat of a blessing.

So this got me to thinking about anti-spam solutions on the Pocket PC. There aren't any that I'm aware of. On the desktop side of things, I've started using a new solution called POPFile. It's an ugly, ugly solution that I could never recommend to my mom or anyone other than a hardcore geek, but it's amazingly effective at blocking spam - over 93% accurate now, and climbing daily. But back to the topic at hand...

I've heard of server-side solutions for email on the desktop PC, but the few I've tried were utterly horrible. Being the control freak that I am, I also have a hard time giving control of my email over to an external party. I'd much rather have a client-side solution that allows me to confirm with absolute certainty that the email I'm deleting really is spam. Now as this relates to the Pocket PC, what sort of solution do you think would work best? A client-side tool that would somehow plug into Pocket Inbox and would let you tag spam if the filter didn't catch it (think Spamnet or POPFile), or would you want a server-side solution that would take care of the spam blocking, giving you the filtered mail?