I am in the process of moving my web apps to the new DHC server. During last night’s run for one of them, I discovered that Google does not see any IPv6 PTR record for the new DHC server. Here is the error message I cam getting:
gmail-smtp-in.l.google.com[2607:f8b0:400d:c0d::1a] said: 550-5.7.1
[2607:f298:5:101d:f816:3eff:fef7:5611] Our system has detected that
550-5.7.1 this message does not meet IPv6 sending guidelines regarding PTR
550-5.7.1 records and authentication. Please review 550-5.7.1
https://support.google.com/mail/?p=ipv6_authentication_error for more 550
5.7.1 information. u189si12672382qkd.269 - gsmtp (in reply to end of DATA
In the past the ISP’s I have used have managed the PTR records. How does DreamCompute handle this? How can I correct this problem? Our college uses Gmail to communicate with all of our students, so this is an issue for me. In the short term, I have removed the AAAA record for the DHC server for the time being.
Thank again for your help.