I using outlook 2010 on a Windows 7 32bit system. We have 10 POP 3 accounts all are working normal except 1. I can send that one an email and see it online she than checks her email with outlook and it goes away from the online website but doesn't show up in her inbox for a couple of days. This doesn't always happen but about 1 in 20 emails are late. It is a variety of extentions on the sent emails.