I have a serious problem in Microsoft Outlook 2003. Every single email I send is going to the "sent items". No errors occur. Everything seems good but none of the emails are being received. Throughout our office outlook is not working on one single computer. It was working fine a few weeks ago, however. Can anyone help?
Unless a virus or software update has affected all machines, the ISP is, presumably, the only common factor, therefore, it sounds like a server/ISP problem. You could test this by installing another email client such as Thunderbird on a test machine. You could also check firewall settings but that seems an unlikely cause.