I sent myself an e-mail from my server to my gmail account, here is one of the headers (partially redacted):
Received: from cpvds3xx.xxx.com (dev1.xxx.com. [209.51.132.xxx]) by mx.google.com with ESMTPS id b71si12090017yhf.148.2014.03.06.12.09.35 for <email@example.com> (version=TLSv1 cipher=RC4-SHA bits=128/128); Thu, 06 Mar 2014 12:09:35 -0800 (PST)
I would like to know where does
cpvds3xx.xxx.com come from. I understand that it is a host name, but what is the source of that information? Does exim send it? Does it come from my DNS zone file? rDNS entry? or is there something else?
Background: cpvds3xx.xxx.com is a host name of a virtual server, and dev1.xxx.com is one of the web sites hosted on that server. WHM + cPanel + exim + LAMP
And a more practical question, how do I align that name with the name of my web site (dev1.xxx.com)?