I have been receiving ongoing complaints about client's email being rejected, and it is because the shared IP they are on doesn't have a proper rDNS record. I have been filing tickets with them (IBM) for 2 months and their response has been the same, the rDNS record is correct. It finally dawned on them, and I guess me, that the complaints are with the secondary shared IP, not the primary shared IP.
Both IP addresses have errors regarding:
SMTP Banner Check Reverse DNS does not match SMTP Banner
SMTP TLS Warning - Does not support TLS.
However, the secondary IP gets this error when checked in MXLookup:
SMTP Reverse DNS Mismatch Reverse DNS does not contain the hostname
Since cPanel supports multiple shared IP address, it would see there would be a way to give the secondary IP address a proper rDNS record.
This issue has caused me a lot of problems for months now and I would like a definitive answer "from the horse's mouth" before I start changing 50 domain IP address, something I don't care to do.
Running CENTOS 6.9 standard [server6] v68.0.20
Thanks!
Both IP addresses have errors regarding:
SMTP Banner Check Reverse DNS does not match SMTP Banner
SMTP TLS Warning - Does not support TLS.
However, the secondary IP gets this error when checked in MXLookup:
SMTP Reverse DNS Mismatch Reverse DNS does not contain the hostname
Since cPanel supports multiple shared IP address, it would see there would be a way to give the secondary IP address a proper rDNS record.
This issue has caused me a lot of problems for months now and I would like a definitive answer "from the horse's mouth" before I start changing 50 domain IP address, something I don't care to do.
Running CENTOS 6.9 standard [server6] v68.0.20
Thanks!
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