troubleshooting Question

How do i block spam mail which (short period of time) contains valid original client IP (A record)

Avatar of Gordon Tin
Gordon Tin asked on
* spam filterExchangeMicrosoft Server OS
7 Comments1 Solution24 ViewsLast Modified:
Dear Sir

Background:
Email Server: Exchange2016
Spam Mail Engine: Symantec Security for Microsoft Exchange "SMSME"

It is noticed that some spam mail can send through our spam engine. After Checking, I realised that some spam mail contains valid "Original Client IP" can send through the spam engine.
(I believe that these spam mails are without MX record and they had only A records from dynamic IP. See Attachment)

See Attachment, the spam is changing email address and Original IP all the time in a systematically.

Question:
Is it any way that I can avoid spam mail (with original client IP) penetrate my spam engine and email Server???????

Is it possible for me to config exchange to block emails without MX record????




 



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