Can I change Smtp port?
Sure; use servername:port format. As an example, if you want to use "smtp.provider.com" on port 579, simply enter smtp.provider.com:579 as your Smtp server address.
If no port is specified, default port (25) is used for Smtp connections.
Note for SendBlaster users
SendBlaster users can enter the port number into a specific "Port" field.