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FML spam low catch rate
Hi,
Anyone experience or notice FML has a low catch rate of dubious spam messages?
ACL and Recipient Policy with Session and AS Profile were in placed already. FortiMail uses private DNS for better resolution. SPF in Public DNS defined already.
Any possible workaround to enhance its catch rate?
FML 7.0.2 GA as GW Mode
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Created on 03-09-2022 06:55 AM
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Hello @R_F ,
Thank you for using the Community Forum. I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.
Thanks,
Created on 03-11-2022 02:09 PM
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Hello @R_F ,
As per your query, I got advice from the expert to first check some basics like:
- check fml-session log and mailheader of undetected spam
- make sure FML is first instance to receive email and it is not placed behind another relay
- check for any backup-MX which will relay to FML
- use ACL to block common Dynamic ISP Dial-Up Rages by either IP Fange oder RevDNS
- finetune session profile, e.g. allowed errors, delay on error etc.
- use Dictionary to search for common mass-mailing-frameworks (sendgrid, javamailer, etc)
- use sender reputation
- check antispam profile for IP reputation settings
- activate recipient verification if not done yet
Also, do you use Fortinet's IP reputation database (RBL)? If yes, can you confirm if you have
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hi, apology for late revert. I will take a look on this and let you know the outcome.
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Hello R_F,
did this solve your problem and increase the catch rate?
Thanks
Jochen