Summary
in1.smtp.messagingengine.com has six IP numbers. All of them are on the same IP network.
mx1.imichael.org,
mail.modusinc.com,
mx0.chasmcity.com,
fastmail1.ph0t.net,
mail.veldthuis.com and at least three other hosts cnames to this hostname.
mail.wintoni.us,
mail.retro64.com,
the-transcend.com,
smtp.us.fastmail.fm,
smtp.us2.fastmail.fm and at least twelve other hosts point to the same IP.
vermontvultures.org.au use this as a nameserver.
zda.ch,
dwe.com,
main.cc,
agst.net,
ccso.net and at least 100 other hosts use this as a mailserver.
smtp.messagingengine.com is delegated to two nameservers, however both delegated nameservers are missing in the zone. All nameservers are at
messagingengine.com. They are on different IP networks.
in1.smtp.messagingengine.com is hosted on six servers in United States.