User's Manual
Table Of Contents
- Contents
- About This Guide
- 3Com Email Firewall Overview
- Configuring Mail Delivery
- Configuring Mail Security
- Anti-Spam Configuration
- Reporting
- System Configuration
- System Management
- Monitoring Activity And Status
- Customizing System Messages
- Reset to Factory Default Settings from Console
- Third Party Copyright and License Agreements
- Glossary
40 CHAPTER 3: CONFIGURING MAIL SECURITY
SMTP Authenticated
Relay
This feature allows authenticated clients to use the 3Com Email Firewall
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.