i have a problem with my helo/ehlo records on my dedicated machine. i have multiple IPs, and a domain hosted on a non-primary machine is having the helo/ehlo issues. I'm running apache, centos, bind, cpanel11 with WHM11.
the problem site is example.com,
RDNS seems to be working and for the ip range xxx.142-xxx.145 points back to host.maindomain.com
$ nslookup example.com Name: example.com Address: xx.xxx.xxx.144
$nslookup xx.xxx.xxx.144 144.xxx.xxx.xx.in-addr.arpa name = host.maindomain.com
DNS Clustering is disabled
Error message (dnstuff.com)
Mail server host name in greeting
WARNING: One or more of your mailservers is claiming to be a host other than what it really is (the SMTP greeting should be a 3-digit code, followed by a space or a dash, then the host name). If your mailserver sends out E-mail using this domain in its EHLO or HELO, your E-mail might get blocked by anti-spam software. This is also a technical violation of RFC821 4.3 (and RFC2821 4.3.1). Note that the hostname given in the SMTP greeting should have an A record pointing back to the same server. Note that this one test may use a cached DNS record. example.com claims to be host host.maindomain.com [but that host is at xx.xxx.xxx.142 (may be cached), not xx.xxx.xxx.144]. <br />
any advice is appreciated. please let me know if i need to provide any details further to help diagnose and resolve the issue.