There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
<hbex01.domainname.com #5.5.0 smtp;550 SPF: x.x.x.x is not allowed to send mail from domainname.com>
When I preform the following command in NSLOOKUP
I get the following
"v=spf1 mx ptr mx:mx.domainname.com mx:mx.domainname.com -all"
I am not sure what the ptr here means (Reversed IP) ?
Now I do not know the Service Provider for this client and obviously I need to change the spf record ...what is the best way or best tool to know where this domain and his mail mx record is registered? What does the ptr means here?