Cendyn Confirms Trump Server Used by Alfa Bank

NBC's Ali Vitali (covering Trump and the GOP for @nbcnews) 
provides a statement she indicates comes from CenDyn and 
the Trump Organization, in which CenDyn acknowledges that
the Trump server has been used for a bank  to communicate with
Alfa Bank, using Meteron - a meeting sofware app. 

CenDyn states that their servers are not dedicated to a 
specific client. Yet the Internet-Wide Scan Data Repository 
(scans.io) data show that the 
hostname mail1.Trump-Email.com has been stable since at least 2013. It
did not change for three years, then did change on 
n 23 September 2016. At the time of this writing, 2 October 2016, no other hostname has pointed 
to this IP 66.216.133.29:
just trump1.contact-client.com and mail1.trump-email.com. So this IP
address is associated with only that server. 

SCROLL DOWN TO CONTINUE READING - reverse delegation OOPS!

The Trump Organization states that it is not sending or
or receiving any communications and that it has no interaction
with CenDyn.  CenDynstated the reason they recreated a trump1.contact-client.com hostname pointing to this same IP address was for the Trump Organization
to use the CRM software CenDyn provides to the Trump Organization.

Linking a Domain to an IP Address

The DNS binds a human readable phrase to an IP address. A forward
resolution zone is where a machine maps the DNS to the IP
address.  A
reverse resolution zone links an IP to a DNS address. They are two
views of the same binding.

Trump, CenDyn or some other party associated with the domain sought to erase the mail1.Trump-Email.com 
host by deleting forward resolution zones.  So the domain name was
removed from the normal way one would look up a domain. However, the
reverse delegation still exists as of 2 November 2016. You can look at the
image concurrent with this writing here, and then check yourself with
the link to see if the resolution has been removed. 

https://mxtoolbox.com/ReverseLookup.aspx

This is interesting because it is unusual to take a production email server used for marketing off the forward lookup. If this were a braod marketing campaign, you would want people to click and connect to your hotel and luxury good offers. If this were used for political fund-raising email then that is similarly unusual.