Case 1: Web release host name/IP is empty/default

If Web release host name/IP is not configured (the default), the web release/delete links that appear in spam reports will use the fully qualified domain name (FQDN) of the FortiMail unit.

For example, if the FortiMail unit’s host name is fortimail, and its local domain name is example.net, resulting in the FQDN fortimail.example.net, a spam report’s default web release link might look like (FQDN highlighted in bold):

https://fortimail.example.net/releasecontrol?release=0%3Auser2%40examp le.com%3AMTIyMDUzOTQzOC43NDJfNjc0MzE1LkZvcnRpTWFpbC00MDAsI0YjUyM2N TkjRSxVMzoyLA%3D%3D%3Abf3db63dab53a291ab53a291ab53a291

In the DNS configuration to support this and the other DNS-dependent features, you would configure the following three records:

example.net IN MX 10 fortimail.example.net fortimail IN A 10.10.10.1 1 IN PTR fortimail.example.net.

where:

• net is the local domain name to which the FortiMail unit belongs; in the MX record, it is the local domain for which the FortiMail is the mail gateway
• example.net is the FQDN of the FortiMail unit
• fortimail is the host name of the FortiMail unit; in the A record of the zone file for example.net, it resolves to the IP address of the FortiMail unit for the purpose of administrators’ access to the web UI, email users’ access to their per-recipient quarantines, to resolve the FQDN referenced in the MX record when email users send Bayesian and quarantine control email to the FortiMail unit, and to resolve to the IP address of the FortiMail unit for the purpose of the web release/delete hyperlinks in the spam report
• 10.10.1 is the public IP address of the FortiMail unit

Case 2: Web release host name/IP is configured

You could configure Web release host name/IP to use an alternative fully qualified domain name (FQDN) such as webrelease.example.info instead of the configured FQDN, resulting in the following web release link (web release FQDN highlighted in bold):

https://webrelease.example.info/releasecontrol?release=0%3Auser2%40exa mple.com%3AMTIyMDUzOTQzOC43NDJfNjc0MzE1LkZvcnRpTWFpbC00MDAsI0YjUyM 2NTkjRSxVMzoyLA%3D%3D%3Abf3db63dab53a291ab53a291ab53a291

Then, in the DNS configuration to support this and the other DNS-dependent features, you would configure the following MX record, A records, and PTR record (unlike “Case 1: Web Release Host Name/IP is empty/default” on page 52, in this case, two A records are required; the difference is highlighted in bold):

example.net IN MX 10 fortimail.example.net fortimail IN A 10.10.10.1 webrelease IN A 10.10.10.1 1 IN PTR fortimail.example.net.

where:

• net is the local domain name to which the FortiMail unit belongs in the MX record, it is the local domain for which the FortiMail is the mail gateway
• example.net is the FQDN of the FortiMail unit
• fortimail is the host name of the FortiMail unit; in the A record of the zone file for example.net, it resolves to the IP address of the FortiMail unit for the purpose of administrators’ access to the web UI and to resolve the FQDN referenced in the MX record when email users send Bayesian and quarantine control email to the FortiMail unit
• webrelease is the web release host name; in the A record of the zone file for example.info, it resolves to the IP address of the FortiMail unit for the purpose of the web release/delete hyperlinks in the spam report
• 10.10.1 is the public IP address of the FortiMail unit

Configuring a private DNS server

In addition to the public DNS server, consider providing a private DNS server on your local network to improve performance with features that use DNS queries.

Figure 15:Public and private DNS servers (server mode)

If the FortiMail unit is operating in server mode, the private DNS server should contain identical records to a public DNS server.

If you choose to add a private DNS server, to configure the FortiMail unit to use it, go to System > Network > DNS in the advanced mode of the web UI.