Excluding senders from bounce verification
If you do not want to verify bounce verification tags from certain senders, you can do so by adding the sender host names to the exempt list.
To configure the tagging exempt list
1. Go to AntiSpam > Bounce Verification > Verification Exempt List.
2. Click New.
3. Add the host name. FortiMail will use reverse DNS to resolve the client’s IP address into host name. You can use wildcard to include all hosts within a domain, for instance, *.example.com.
4. Click Create.