[dns-operations] Looping wildcard CNAMEs can be an obstacle for DANE, (googledomains.com-hosted example)

John Levine johnl at taugh.com
Tue Apr 17 19:51:04 UTC 2018

In article <C708D877-8BC6-45B9-86A2-6E6E382EEB8E at dukhovni.org> you write:
>  *.frasier.family. IN CNAME \@
>breaks email delivery to that domain from DANE-enabled Postfix or Exim.

Except that it has no MX and the A record host doesn't respond on port
25.  It's just broken.  Nothing to see here, move along.

John Levine, johnl at iecc.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly

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