Update: Wrong Setting: Beware of Text Messaging and Direct Push email with Windows Mobile 5
***Quick Update***
Thanks to all who posted comments and emailed me. It turns out that the wrong setting was turned on with my phone. I was using a pre-Windows Mobile 5 feature that used Text Messaging. Sorry for the confusion and thanks to everyone for the correction!
I will post the full details of the correct settings and what was configured incorrectly in a new post tomorrow.
I have created a blog entry on the correct settings here: https://blogs.technet.com/tmintner/archive/2006/07/04/440182.aspx
**********************************
A little off topic here, but I just wanted to give everyone a heads up that if you are using Direct Push with Windows Mobile 5 you need to make sure you have unlimited Text messaging as part of your plan. Apparently Direct Push works by sending a Text message to your phone to tell it to get the email message as new email arrives.
Verizon had the wrong plan set up for me and I got dinged with a $60 bill just for text messaging! Thankfully they were great about it and credited my account and put me on the right data plan.