Fortinet FortiMail-100, Install Manual

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Server mode deployment Example 3: FortiMail unit in DMZ
FortiMail™ Secure Messaging Platform Version 4.0 Patch 1 Install Guide
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Configuring the MUAs
Configure the email clients of local and remote email users to use the FortiMail unit as
their outgoing mail server (SMTP)/MTA. For local email users, this is the virtual IP address
on the FortiGate unit that maps to the FortiMail unit, 172.16.1.2; for remote email users,
this is the public IP address of the FortiMail unit, 10.10.10.5 or fortimail.example.com.
If you do not configure the email clients to send email through the FortiMail unit, incoming
email can be scanned, but outgoing email cannot.
Also configure email clients to authenticate with the email user’s user name and password
for outgoing mail. The user name is the email user’s entire email address, including the
domain name portion, such as user1@example.com.
If you do not configure the email clients to authenticate, email destined for other email
users in the protected domain may be accepted, but email outgoing to unprotected
domains will be denied by the access control rule.
Testing the installation
Basic configuration is now complete, and the installation may be tested. For testing
instructions, see
“Testing the installation” on page 159 .
For information on configuring additional features, see the FortiMail Administration Guide .
Example 3: FortiMail unit in DMZ
In this example, a FortiMail unit operating in server mode within the demilitarized zone
(DMZ), protected by a firewall but also separated from local email users’ computers by it.
Remote email users’ computers and external email servers are located on the Internet,
outside of the private network. The FortiMail unit hosts and protects accounts for email
addresses ending in “@example.com”.
Figure 52: Server mode deployment in a DMZ
External
Em ail Server
Local Em ail U sers
Rem ote Em ail U sers
Public D N S Server
Internet
dm z
192.168.1.1
w an1
10.10.10.1
port1
192.168.1.5
internal
172.16.1.1
(virtual IP:
172.16.1.2)
Em ail D om ain:
@ exam ple.com
exam ple.com IN M X 10 fortim ail.exam ple.com
fortim ail IN A 10.10.10.1
Server M ode
Private D N S Server