Controlling E-Mail Settings

[epretorious]

While testing account creation yesterday, I noticed two anomalies in the e-mail headers of the Order Confirmation and the Welcome e-mails sent to newly-created accounts:

Return-Path: <[color="#FF0000"]gorocketpowered[/color]@www.rocket-powered.com>
Received: from www.rocket-powered.com ([[color="#FF0000"]74.50.122.55[/color]])
       by mx.google.com with ESMTPS id x66si7898474yhd.12.2013.04.11.19.26.18
       (version=TLSv1 cipher=RC4-SHA bits=128/128);
       Thu, 11 Apr 2013 19:26:19 -0700 (PDT)
Received-SPF: fail (google.com: domain of [color="#FF0000"]gorocketpowered[/color]@www.rocket-powered.com does not designate [color="#FF0000"]74.50.122.55[/color] as permitted sender) client-ip=[color="#FF0000"]74.50.122.55[/color];
Authentication-Results: mx.google.com;
      spf=hardfail (google.com: domain of [color="#FF0000"]gorocketpowered[/color]@www.rocket-powered.com does not designate [color="#FF0000"]74.50.122.55[/color] as permitted sender) smtp.mail=[color="#FF0000"]gorocketpowered[/color]@www.rocket-powered.com

I do recognize the gorocketpowered username -- it is the "System user account used to manage files and folders of websites within the [Plesk] subscription" -- but I don't recall using it in setting up WHMCS. Can this value be configured manually in WHMCS?

 

The IP address 74.50.122.55 is one of the addresses assigned to this VPS...

eric@eric-D630 ~ $ nslookup www.rocket-powered.com
Server:		127.0.1.1
Address:	127.0.1.1#53

Non-authoritative answer:
www.rocket-powered.com	canonical name = rocket-powered.com.
Name:	rocket-powered.com
Address: 66.232.99.54

eric@eric-D630 ~ $ nslookup 66.232.99.54
Server:		127.0.1.1
Address:	127.0.1.1#53

Non-authoritative answer:
54.99.232.66.in-addr.arpa	name = rocket-powered.com.

Authoritative answers can be found from:

eric@eric-D630 ~ $ nslookup [color="#FF0000"]74.50.122.55[/color]
Server:		127.0.1.1
Address:	127.0.1.1#53

** server can't find [color="#FF0000"]55.122.50.74[/color].in-addr.arpa.: NXDOMAIN

...but it is not associated with the Rocket-Powered.com domain and I don't recall using it in setting up WHMCS. How is this value obtained (i.e., Where did WHMCS even learn about this address)? Can this value be configured manually in WHMCS?