Bottom line: The wrong domain is being returned to rDNS queries.
I know PTR records aren't required and are somewhat controversial. The decision...
I have 2 DNS Severs :
ns1.host.com = HostIP1
ns2.host.com = HostIP2
when i do reverse lookup i get:
ns1.host.com -> HostIP1
Emails send fine, however it ends up in the spam folder when sending to gmail.
I've read that it is something to do with the ptr records?...
Contact your service provider or the company that gave you your IP numbers, ask them to set up reverse name service.
Server is a Google...
Separate names with a comma.