On the SMTP Inbound Control section, On the Inbound Conection Control if you click on the text for help it tells you “Refuse all messages from host whose names are not found in DNS”.
On the Inbound Intended recipient the help for the Verify local domain recipient… the help tells you “Select Enable for Domino to verify the name of the connecting host by performing a Reverse DNS lookup…”
Which should you use to control reverse DNS lookup?