If you want your system to deliver email WikiNewsletters or to support the NamespaceRquestTools, you need to set up to three options in the web.config file: SMTPServer, SMTPUser, SMTPPassword:

• SMTPServer must be set to the name of an SMTP server that will relay mail for your site.
• If your SMTP server uses login authentication, you should set the SMTPUser and SMTPPassword options. The user name used for authentication will be what you set for SMTPUser and the SMTPPassword will be the password.