Help on DNS settings, need to remove from black list, need to ensure if the reverese lookup and forwarders are properlly configured. Here is what i found please have a look
Your IP 81.xxx.x0.1xx is part of
abcd BT-UK-AS BTnet UK Regional network
and the Networks 81.xxx.0.0/xx xx.xxx.0.0/xx
Reverse DNS (PTR) exists and claimes to be: mail.domain.com
Forward DNS for mail.domain.com is: 213.xxx.xxx.xx
WARNING: Forward-DNS does NOT match Reverse-DNS.
DNS is INCONSISTENT.
Please request your Admin or Provider to fix this.