Great to stumble across and finally see this happening:
[James-MacBook-Pro]$ host huit.harvard.edu huit.harvard.edu has address 18.104.22.168 huit.harvard.edu mail is handled by 20 alt2.aspmx.l.google.com. huit.harvard.edu mail is handled by 20 alt1.aspmx.l.google.com.
for those wondering what "22.214.171.124" is, here it is...
[James-MacBook-Pro]$ nslookup 126.96.36.199 Server: 10.0.1.1 Address: 10.0.1.1#53 Non-authoritative answer: 188.8.131.52.in-addr.arpa name = ec2-50-17-51-113.compute-1.amazonaws.com.
Awesome to see a major .edu IT org using not one but three outsourced services!