In article <3BB87806-0EEC-47EF-B30F-50029DC2D79F(_at_)dukhovni(_dot_)org> you
The middlebox breakage affects mobile users in hotels, airports, home
networks, ... It has little to no effect on MTAs in data-centres.
MTA-to-MTA DNSSEC does not face any meaningful middle-box barriers. ...
Bottom line, sign-away, you'll not have any issues, unless your domain
is hosted by a small number of small (mostly Dutch) providers.
I agree that the DNSSEC problems have close to nothing to do with mail issues.
But it's hard to sign the MX records for a domain without also signing the A
and AAAA records.
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