Domain specific IP allow to SMTP for 3rd party filtering
Idea shared by Vincent Sammons - August 2, 2016 at 5:05 AM
Proposed
I have recently started used a 3rd part spam filtering service. While I changed records to point to the new filtering server, many email circumvent it by going directly to the servers HOST IP address. I am not able to restrict all IP ADDRESSES other than the 3rd party filtering servers.
 
It would be great to be able to have each domain to restrict their own SMTP connections.
Vincent Sammons

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