I just reformatted my hard drive and installed Windows XP Pro and Office XP. After setting up Outlook and testing it a little, I noticed that when I have multiple addresses in the TO box, not everyone listed there receives my email.
I have several POP3 accounts and tested this by sending myself emails. I put all my POP3 email addresses in the TO box and that is how I discovered that there is something wrong. I haven't really tried figuring out if there is a pattern of some sort to this problem. I was hoping someone on EE can lead me in the right direction.