When sending  E - Mail from the site it gets bounced back can anyone tell me how to fix this or do I have to change host.
error message

SMTP error from remote mail server after initial connection: host mx2.comcast.net [76.96.30.116]: 554 imta34.emeryville.ca.mail.comcast.net comcast 184.164.140.26 Comcast requires that all mail servers must have a PTR record with a valid Reverse DNS entry. Currently your mail server does not fill that requirement. For more information, refer to: http://help.comcast.net/content/faq/PTR