Your server (ISP) has storage and is limited. If you don't remove all your read messages from the server it will fill up. Your read/saved/deleted messagese are also stored on your PC. Have you cleaned them up lately? Emptied the Deleted Items folder?
I'm using Windows XP Home Edition on a Sony Viao.
Every once in a while I cannot get into Outlook Express, OR If I am able to get in All of a sudden it tells me I don't have enough memory or it can't read the messages.
Is there a limit to how much it will handle? I know Hotmail holds 250 mb of space, what does Outlook Express hold?