Fortigate - AntiSpam - SMTP - Block instead of discard

[KPS]

Hi!

I want to use my Fortigates as SpamFilter and tried to enable it, but I have some complaints from my users:

Fortigate is "transparent" in front of my MTA.

If a message from outside is declared as spam through FortiGuard Spam Filtering, it is just dropped, but the sender is getting a positive feedback code (250 2.0.0 Ok: queued as...)

Shouldn't Fortigate just intercept the session, that the sender will get an error code?

Did I do something wrong?

Thank you for your help!

Regards,

KPS

[abelio]

Hi,

modify the Spam action to be taken when traffic matches your antispam  profile.

Default is "discard" for SMTP; change it to "tag".  Mail will reach the recipient with a tag you can customize

[KPS]

Hi abelio!

I am aware of that feature, but this is not, what I am looking for.

Isn't there a "block"-feature to just interrupt the session, when spam is detected?

[abelio]

Apparently this is a semantic issue;

If you check docs at https://docs.fortinet.com/document/fortigate/6.2.1/cli-reference/347620/emailfilter-profile

you'll see: