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Re: [Emailcore] Ticket #50: Use of top level domains in SMTP

John Levine <johnl@taugh.com> Sat, 24 July 2021 00:24 UTC

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From: John Levine <johnl@taugh.com>
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Subject: Re: [Emailcore] Ticket #50: Use of top level domains in SMTP
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It appears that John Levine  <johnl@taugh.com> said:
>It appears that Dave Crocker  <dcrocker@bbiw.net> said:
>>Support for TLDs as FQDNs is standardized, albeit new.  Hence it can -- 
>>and should -- be within formal email standards specifications.
>
>I hope you're not referring to things like .BANANAREPUBLIC (clothes)
>or .DUCK (a toilet cleaner.)

FYI, the DNS rules at ICANN for vanity domains are the same as the
rules for any other gTLDs. You cannot put an A or MX record at at the
apex of a vanity domain, same as you cannot put one at the apex of
.COM or .WTF.

The only TLDs with MX at the apex are a handful of ccTLDs, and as I said, most of those
don't actually work.

R's,
John

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