On Mon, Nov 04, 2024 at 08:23:37PM +0800, Adriel via Postfix-users wrote:
> say i have a subdomain sub.xyz.com.
>
> if I make a CNAME as,
>
> sub.xyz.com CNAME to xyz.net
A CNAME redirects *all* RRsets for a given owner name other than
(DNSSEC) RRSIG and NSEC. So MX and TXT records, ... will be found at
the (ultimate end of CNAME chain) target of the CNAME.
But, CNAMEs DO NOT redirect child nodes, so, for example, the name
"_domainkey.sub.xyz.com" is not affected by the CNAME, and any DKIM keys
for that that subdomain will be at:
<selector>._domainkey.sub.xyz.com IN TXT ...
Unless explicitly redirected by a CNAME.
--
Viktor.
_______________________________________________
Postfix-users mailing list -- postfix-users@postfix.org
To unsubscribe send an email to postfix-users-le...@postfix.org
