Using SMTP Authentication in FortiMail

 Enabling SMTP Authentication

First we’ll need to enable SMTP authentication.

1. Go to Dashboard > Console. Enter the following commands to enable the feature. And if there is a gateway before the mail server, add the gateway to the exempt list.
   config system security authserver
  set status enable
      config exempt-list
    edit 1
      set sender-ip-mask 172.20.140.232/32
    next
  end
end


Checking SMTP Authorization Score and Record

With SMTP authentication enabled, we can now look at a few things you can perform in the CLI:

1. You can display and delete automatically added IP addresses:
   #diagnose system authserver auto-exempt display
   and to delete the IP address, enter
   #diagnose system authserver auto-exempt delete xxxx
2. You can display the iptables statistics for currently blocked IP addresses: #diagnose system authserver iptables ipv4
3. You can get the authentication records for a specific IP address:
#diagnose system authserver records 172.20.140.230
4. You can get the authentication status of a specific IP address, showing you if it’s safe or if it’s blocked: 
   #diagnose system authserver status 172.20.140.231