Computer buffs - E mail messages erasing when the Inbox is clicked?

My mother has reported to me that her unread Email messages erase when she reads one and then clicks back to the Inbox. She is on Verizon in New Jersey. She has tried communicating with Verizon troubleshooters - 90 minutes worth - to no avail. Ideas?

Anonymous2008-12-31T09:54:48Z

Favorite Answer

Is this their web mail or is she using Outlook or another dedicated mail application?