Sprint Mogul not retrieving all of my emails

[psywzrd]

I'm having a problem receiving some of my emails on my Sprint Mogul. I have pop3 email and I've set the Mogul up to retrieve my emails every 30 minutes. For some reason, it's not grabbing all of my emails. For example, I checked my email on my computer this morning using Outlook and I had 2 emails that had come in shortly after midnight; however, those email never showed up on my Mogul (I have my Outlook set up to leave a copy of all messages on the server, even when deleted in Outlook). I tried doing several manual send/receives and those emails still never showed up on the Mogul. This has happened to me several other times as well. Like I said, I have my email set up to leave copies of my messages on the server for two weeks so that I can retrieve my emails several different ways. Any idea why some emails come through on my Mogul and some don't?