13.249.29.21
server-13-249-29-21.iah50.r.cloudfront.net
13.249.29.221
server-13-249-29-221.iah50.r.cloudfront.net
13.249.29.64
server-13-249-29-64.iah50.r.cloudfront.net
13.249.29.77
server-13-249-29-77.iah50.r.cloudfront.net

alt1.aspmx.l.google.com.
alt2.aspmx.l.google.com.
alt3.aspmx.l.google.com.
alt4.aspmx.l.google.com.
aspmx.l.google.com.