All of a sudden, getting bouncebacks from gmail with the error "this message does not meet IPv6 sending guidelines regarding PTR


New Member
Jun 24, 2023
I get the following error all of a sudden today

this message does not meet IPv6 sending guidelines regarding PTR
<– 550-5.7.1 records and authentication

Has anyone seen this/know how to resolve it?
I ended up solving it via disabling ip v6 at the debian level so therefore forcing ipv4 as my cloud provider is unable or unwilling to assign a ptr to an ip v6 address
  • Like
Reactions: Stoiko Ivanov
glad you found a workaround - still strange that your provider refuses to provide reverse ptrs.


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