Valid port numbers are 1 to 65535.
If you want to enable ESMTP in the next step, specify a valid email address.
Login: Login is an older version of the mail user agent. The server and agent both use BASE64 to authenticate the user name and password.
Plain Text: Plain Text is the easiest to use but can also be unsafe because the user name and password are sent as one string and BASE64 encoded before being sent over the Internet.
CRAM-MD5: CRAM-MD5 uses a combination of a challenge-response authentication mechanism and a cryptographic Message Digest 5 algorithm to exchange and authenticate information.
Due to security concerns, the Community Name displays as a masked value using the asterisk (*) character. The default value assigned is: "public".