I can’t delete anything in my outlook express. First I thought It was my computer, but it wasn’t. It was just in Outlook Express.
There are too many emails in your box. First delete the Delete Items Folder by going into: C:\Documents and Settings\YOUR COMPUTERNAME\Local Settings\Application Data\Identities\XXXXXXXXXXX RANDOM LETTERS AND NUMBERS\Microsoft\Outlook Express
Look for the “Deleted Items.dbx” file and rename it “Deleted Items-old.dbx”. Then restart your outlook express. The program should create a new deleted items.dbx file and you should be able to delete emails again.
If that’s still not enough, try deleting the ” Sent Items.dbx ” file. Both not as important.
Others have also mentioned compacting the inbox via Tools/Options/Maintenance…