Question SPF Spam Protection: is it working ?

[OverWolf]

Server operating system version

Almalinux 9.7

Plesk version and microupdate number

18.0.76u2

Hi,
I've configured Plesk to reject email when SPF fail, but I'm receiving email even though the rule is matched.
Is this correct, or I'm doing something wrong ?

Thank you

 

[Raul A.]

Hi,

The SPF Checking mode indicated in your screenshot will result in an SPF reject only when the sending domain has an SPF record and checks against that record result in fail.

You might want "Reject mail when SPF does not resolve to pass", but that will also reject any emails from domains that didn't publish an SPF record or your server can't resolve the SPF record of the sending domain.



Having multiple SPF records for the same domain/subdomain will result in SPF check failures.

I recommend keeping "Reject mail when SPF resolves to fail".