Description
Emails from certain domains may be seen to trigger the following record in the AntiSpam logs:
“Message SPF error: domain <domain_name>, Term is invalid”
Scope
FortiMail after v5.3.8
Solution
The log message is caused by a macro in the "exists" modifier "%{ir}.".
FortiMail does not support "exists" or macros and will completely bypass the SPF validation of these domains.
In FortiMail v5.3.8 and newer, this error is treated as a neutral SPF result and does not increase the sender reputation score or trigger AntiSpam action.
