did you mean windows screen names? or you mean OE Identity?
And what do you mean by 3 email address (all of them can be put in single OE)
Almost every time I switch between screen names (I have 3 different email addresses) I loose the ability to see the information in the email. I called my internet service provider (Insightbb) and we worked out this fix. I'm sure he thought it was permanet. I have to close the program all together and go to the Start..run and type in regsvr32 INETcomm.dll and hit enter and then OK and reopen Outlook Express again and then it works fine till the next time I change screen names. Any suggestions as to what is happening.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic