Gmail ipv6 problem

CentOS release 6.7 (Final)
When i send mail from my server to gmail i have this error:
elivery 5746: failure: 2a00:1450:400c:c07::1a_failed_after_I_sent_the_message./Remote_host_said:550-5.7.1[2001:41d0:2:1e5f::]_Our_system_has_detected_that_this_message_does/550-5.7.1_not_meet_IPv6_sending_guidelines_regarding_PTR_records_and/550-5.7.1_authentication._Please_review/550-5.7.1__

send to others email’s all perfect.
How i can fix that?

Hi dino999

Welcome to IW forums

The method to correct this error depends upon if you are using IPv6 or not

If you use IPv6, you need to ask the cidr provider to create an IPv6 RDNS record or delegate control to you, so you can create the IPv6 record

If you are not using IPv6 and have no cidr IPv6 range, then you would be better turning off IPv6 in your network settings. Ssh into server, vi /etc/sysconfig/network-scripts/ethcfg <or whatever your network config is called> and tell it not to use IPv6

I hope that helps

Many thanks


Thanks. it worked!:smiley: