On the issue of mta-sts vs _mta-sts:

The TXT and A/AAAA records should be under the same label.

W/ or w/o an underscore *will* lead to implementors getting things wrong.

And the two always should be in the same zone, even where zone cuts exist.

It is not just aesthetics.

-JimC
-- 
James Cloos <[email protected]>         OpenPGP: 0x997A9F17ED7DAEA6

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