Need help resolving sendmail issue
Hi VPS Gurus,
First of all apology for the ignorance, I'm quite new in the mail dimension. i have a case where by gmail rejecting mail sent from my VPS server (using plain php mail function - sendmail system)
here's a sample email from gmail
----- The following addresses had permanent fatal errors -----
(reason: 550-5.7.1 [2405:4200:203::17f:6916 16] Our system has detected that this)
----- Transcript of session follows -----
... while talking to gmail-smtp-in.l.google.com.:
<<< 550-5.7.1 [2405:4200:203::17f:6916 16] Our system has detected that this
<<< 550-5.7.1 message does not meet IPv6 sending guidelines regarding PTR records
<<< 550-5.7.1 and authentication. Please review
<<< 550-5.7.1 https://support.google.com/mail/?p=ipv6_authentication_error for more
<<< 550 5.7.1 information. uc3si6226495bkb.312 - gsmtp
554 5.0.0 Service unavailable
Final-Recipient: RFC822; [email protected]
Remote-MTA: DNS; gmail-smtp-in.l.google.com
Diagnostic-Code: SMTP; 550-5.7.1 [2405:4200:203::17f:6916 16] Our system has detected that this
Last-Attempt-Date: Wed, 18 Dec 2013 17:03:46 +0800
My setup is... Domain is registered with Godaddy with A records pointed to my VPS server's ip
Then my VPS server is sending mail using the built in sendmail.
My problem now is if i use native php mail function to a gmail email account, it's not being received by the recipient, however for other recipients it's going in.
I tried reading https://support.google.com/mail/?p=ipv6_authentication_error but couldn't seem to figure out how to do it. i know google is our best friend but with lots of info about ipv6 ipv4 rdns, my head is blowing apart. Hope someone can guide me to the right path for my scenario. Thanks and Advance Merry Christmas to all.