I am trying to setup whitelist for emails from Alloy, the top level DNS is alloyapp.io but I would prefer to whitelist the IP ranges where emails are sent from, is this possible?
We do not recommend whitelisting IP’s as these are subject to change, there is no public descriptor that identifies what our current dedicated IP addresses are for sending email. With that out the way, you can of course configure this to go against what we consider best practice.
At the time of writing our public IP for sending mail is 149.72.212.215