a detour DANE, was A Deep Dive on the Recent Widespread DNS Hijacking

John R. Levine johnl at iecc.com
Thu Feb 28 02:13:05 UTC 2019


> SMTP transitioned from A to MX.

No, it didn't.  A surprising number of real mail hosts only publish an A, 
and I lost the battle to say that MX shouldn't fall back to AAAA.  It 

> SPF could have been the same except people were impatient and had 
> unrealistic expectations of how long it would take.

Perhaps it's a generational thing.  I'm not very interested in transitions 
that won't happen until after I'm dead.


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