99.84.185.114
server-99-84-185-114.iad89.r.cloudfront.net
99.84.185.155
server-99-84-185-155.iad89.r.cloudfront.net
99.84.185.179
server-99-84-185-179.iad89.r.cloudfront.net
99.84.185.82
server-99-84-185-82.iad89.r.cloudfront.net

inbound-smtp.us-east-1.amazonaws.com.
mx1.forwardemail.net.
mx2.forwardemail.net.