How?
IIS MANAGER
Configure SMTP E-mail here to send using an external mailserver will work for ASP scripts – Deliver to SMTP server with credentials
IIS 6.0 MANAGER
Configure the SMTP server here to make the PHP mail-function work.
Properties:
Access-Connection – Grant only your own server IP and 127.0.0.1
Access-Relay – Grant only your own server IP and 127.0.0.1
Delivery-outbound security – Basic Auth login details TLS
Delivery-Advanced – Smart Host smtp server name
PHP.INI
SMTP = 127.0.0.1
smtp_port = 25
SERVICES
configure SMTPSVC to start automatic, so you won’t go crazy after your next reboot…