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Beginner

Email Spoofing, blocking on C380

Hi,

    With a view to helping reduce inbound spoofed mail I recently enabled  reverse PTR & forward 'A' checking against our 'suspectlist' sender group which behaved fine however having then also created an additional sender group 'Unverified' along with a new more strict throttle policy 'throttlemore' began to see issues with test emails not coming through when enabling the 'check for PTR record not existing'.  When checking inbound message headers each hop inbound looks fine with dns/ip entries as expected.  Has anyone experience a similar issue and was there a straight forward resolution ?

many thanks 

2 REPLIES 2
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Cisco Employee

Hi Sandy,

Beginner

HI Raed,

HI Raed,

  Many thanks for this, I should also add that we are attempting to target those senders also pretending to be from a domain they are sending from hence following the steps in the ESA_9-7 User guide to implement sender verfication'

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