Am 28.04.2011 10:58, schrieb Gábor Lénárt:
> Hi All,
> 
> I've just noticed that some domains have MX records like this:
> 
> example.com.  IN MX 10 mail.
> 
> The problem: I have "search ourowndomain.tld" in /etc/resolv.conf. This
> causes that postfix tries to look up mail.ourowndomain.tld as well when
> someone tries to send email to domain example.com (of course example.com is
> only an example here).  It will work, since we have that entry in our zone
> file "ourowndomain.tld" on the authoritative name server.  My question: can
> I tell postfix, not to do this lookup at all?

i would say such MX is invalid and should be ignored

the dot at the end normally defines a full-qualified name
which is not true in the example and AFAIK MX-Records
normally will not be expanded from a client

means:
"host2 CNAME host1"

* "dig CNAME host2" gives no answer, even with dns-suffix
* "dig CNAME host2.domain.tld" is completed by the nameserver

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