Allow Domino to relay mails based on X-Forwarded-For header

Currently Domino can allow to relay the mails if the connecting IP is given in "Exclude these following hosts from anti-relay checks". But when the connecting client is behind the load balancer then Domino has no way to know the actual IP address of the client because only Load balancer is connected to Domino. So in this case, some load balancers have ability to add the field "X-Forwarded-For" in the mail header. So there is a request that, Domino should also check this field for the real IP address of the client and then allow the relay or other SMTP actions based on this IP address. This will allow the Domino server to continue the same SMTP restrictions even behind the load balancer.

This Enhancement Request is submitted for the Domino V12 and V14 versions.