40CHAPTER 3: CONFIGURING MAIL SECURITY
SMTP Authenticated This feature allows authenticated clients to use the 3Com Email Firewall Relay as an external mail relay for sending mail. For example, you may have
remote users that need to send mail via this system.
Client systems must use a login and password to authenticate to the system before being allowed to relay mail. Authenticated relay can also allow authorized mail servers to use this 3Com Email Firewall as a relay. Users must have a local account on this 3Com Email Firewall for the feature to work.
It is recommended that you accept SSL/TLS for incoming mail connections so that account details cannot be intercepted when the relay is enabled. See “SMTP Security” on page 41 for more detailed information on setting up SSL/TLS encryption.
SMTP Banner Click the Advanced button to reveal an option for the SMTP banner. The SMTP banner is exchanged during the HELO session of an SMTP connection. This banner contains identifying information for your 3Com Email Firewall which can be used as information to launch attacks against it. This option allows you to customize the SMTP banner and remove the 3Com Email Firewall’s hostname by using the Domain only option.