I was asked about this a while back and thought I would share. This person has e-mail receiving problems, so I wanted to turn on logging and check that the network ports were really open on his PC: To get a mail log for more details – go to Tools/Options – then the advanced tab/Other button/Enable logging. (mine is not checked – put a tick in yours). The location of the log file can be found at: MAPI (Exchange), POP3, and SMTP transports - The log file has the name OPMLog.log and is located in one of the following locations: c:\Users\ user name \AppData\Local\Temp\Outlook Logging - note this is the location on Windows VISTA You might also want to look at http://www.webpipe.net/howto/Outlook_0x800CCC0E . You will need to install at telnet, but this is documented as: By default, Telnet is not installed with Windows, but you can install it by following the steps below. To install Telnet Client 1. Click the Start button , click Control Panel, click Programs, and then click Turn Windows features on or off. If you are...