I have a client with the following ongoing problem. She receives all her email on her RoadRunner web-mail and on her Blackberry. But some of the emails never arrive on her laptop via Outlook. She has turned off all her SPAM filtering in Outlook but it hasn't helped.
There doesn't seem to be any pattern as to which emails do not make it through to her laptop. Sometimes an email from someone arrives on her laptop and other days email from that same sender does not make it through.
She also noticed that if an email shows up on the Blackberry (but not her laptop) and she resends to herself, it then makes through to her laptop. Why did it not come through the first time?
What's the best way to troubleshoot this?