Microsoft Outlook 2003

Clarifications

from that short description of the problem i am assuming that accounts are setup as POP. main reason for it laying in "end of POP session". basically your computer has no idea what did it download from pop server during last session.

what i would do fist is change settings in outlook to download message and delete it ( uncheck "keep messages on the server" ). download everything - change setting back ( if you have to ) see what changed.

Change your download email setting for 5 minutes or more depending on how many you get a day. If you download every minute or so, Outlook may not have time to mark your messages as downloaded before the process starts again. This has successfully ended the problem in my office.