gmail IPv6 PTR

    What the hell is this? :huh:


    Code
    1. Our system has detected that
    2. this message does not meet IPv6 sending guidelines regarding PTR
    3. records and authentication. Please review
    4. https://support.google.com/mail/?p=ipv6_authentication_error for more information. l4si3456279eew.341 - gsmtp (in reply to end of DATA
    5. command)

    Hello ;


    This is a reverse DNS issue. Do you really use an IPv6 address for SMTP traffic? If yes, you should ensure that a PTR record (reverse DNS) is set and that it match with the AAAA record. This is not something that can be handled through i-MSCP. You should do that via the interface of your server provider.


    For instance:


    AAAA record:

    Code
    1. <host.domain.tld.> IN AAAA <IPv6_ADDR>


    PTR record:

    Code
    1. <IPv6_ADDR> IN PTR <host.domain.tld.>


    But generally, you do not manage the PTR record by yourself. This is normally done automatically by your server provider, once you set the correct value for the reverse DNS option through their interface (if available).


    Refs:


    - https://support.google.com/mai…error&rd=1#authentication
    - http://www.zytrax.com/books/dns/ch8/ptr.html

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    Edited once, last by Nuxwin ().