Re: [Tools-discuss] Can't send mail to Cenk (Fwd: Undelivered Mail Returned to Sender)

Glen <glen@amsl.com> Fri, 11 December 2020 18:03 UTC

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From: Glen <glen@amsl.com>
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Subject: Re: [Tools-discuss] Can't send mail to Cenk (Fwd: Undelivered Mail Returned to Sender)
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On 12/11/2020 10:00, Carsten Bormann wrote:
> I’m sure quite a few mail servers will croak on the v6 address of the second server, and maybe even on the v4 addresses.

Carsten -

They won't.  Only the first server is live and resolving.  If we ever 
had to bring an alternative server online, the DNS would be updated 
automatically and the new server would take the old server's place. The 
DNS you're seeing now is just "backup" records.

Glen