Re: FortiMail 200E Inbound Email Sender Reputation
Most likely not.
The upstream firewall is probably SNAT'ing the clients behind that one-single address which as you indicated is defeating reputation scoring ;)
Flow trace the sessions and remove the SNAT.
PCNSE6,PCNSE7, ACE, CCNP,FCNSP,FCESP,Linux+,CEH,ECSA,SCSA,SCNA,CISCA email/web