Do you perform reverse DNS checks?
Yes, we do perform Reverse DNS checks. If your email is being rejected due to a reverse dns error this is due to a miss configuration at a DNS level with the sending server.
A reverse pointer is an RFC requirement for SMTP servers and other internet hosts a like as desribed below:
RFC 1033 in the "INSTRUCTIONS" section, and later,
RFC 1912 Section 2.1 state: "Every Internet-reachable host should have a name"; and "make sure your PTR and A records match".