Are these all of the IP addresses that we need to whitelist? Is there any other ones we need to consider that might be country specific i.e for New Zealand? If we use IP addresses in our EmailWhitelist, add the IPs listed below: 199.15.212.0/24 199.15.213.0/24 199.15.214.0/24 199.15.215.0/24 192.28.146.0/24 192.28.147.0/24 94.236.119.0/26 37.188.97.188/32 185.28.196.0/24 103.237.104.0/24 103.237.105.0/24 Thanks Vibha.

I think that's current, yes. But what's your goal here? Whitelisting IPs on your own mail server will mask delivery problems. I really don't recommend that you do the whitelisting -- if your client has a customer who is willing to whitelist Marketo, that can be important.