davidenco 1 Posted March 7, 2018 Share Posted March 7, 2018 I have SPF checking and Greylisting enabled in Mail Security for Exchange Server 6.5. The documentation says SPF checking has 3 states; Pass, Fail or Not Available. I have enabled the option to bypass Greylisting if SPF passes but am I right in thinking that if an email does not pass SPF checking that Mail Security will perform Greylisting instead? Link to comment Share on other sites More sharing options...
ESET Staff filips 44 Posted March 7, 2018 ESET Staff Share Posted March 7, 2018 Hi davidenco, You are right, if an email fails the SPF check or if there is no SPF record for the sending domain, greylisting will be performed. Link to comment Share on other sites More sharing options...
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