Another thing to be aware of is that most Anti-Virus programs now default to blocking you from automatically sending mail on a Windows machine. If you are running in a corporate enviroment this setting can usually be controlled by the network administrator, which will override any changes to the setting you make locally. In order to enable sending mail in this case you have to request having the policy turned off for your system. The only way around this if you can not get the policy turned off is to go through another supported mail client like Outlook via Win32::OLE.