GreenGeeks Support will need to make changes to your web sites' DNS setting for "MX entries" that have the same priority, "A record"s or "CName"s. MX records that each have different priorities can be changed inside the Control Panle by selecting the MX Entry icon.

You must request DNS changes by submitting a ticket through the Help Center. To ensure quicker processing, please include your control panel password in the ticket.

Here are some examples of different DNS records:

CName: blog.mydomainname.com --> ghs.google.com
A record: others.yourdomain.com --> 72.181.55.10 (pointed to an IP address)
MX Entries: mydomainname.com --> 5 ALT1.ASPMX.L.GOOGLE.COM
MX Entries: mydomainname.com --> 5 ALT2.ASPMX.L.GOOGLE.COM

Attn: Our servers do not support Reverse DNS Lookup. This means that  Reverse DNS Lookups do not resolve to the domain name, but instead to the server that the hosting account is on.

We do enter TXT entries and PTR entries to help with SPF records when sending email.