No MX record drops mail
mayer at gis.net
Thu Jun 13 18:59:01 UTC 2002
At 12:58 AM 6/10/02, Nanaya Dam Byznis wrote:
>Danny Mayer <mayer at gis.net> wrote in message
>news:<adt9e4$853i$1 at isrv4.isc.org>...
> > >
> > >Our server is the one that drops mail to domains without an MX record
> > An MX record is NOT required for SMTP to deliver mail provided that the
> > FQDN has a valid A or AAAA record and is able to receive mail.
> > Your server is misconfigured. Please read the appropriate mail RFC's.
>Which one in particular has relevance to the sendmail.mc ruleset i
> > >dnl # define(`_RELAY_MX_SERVED_', 1)dnl
> > >from the mc file, but i still get returned mail
> > >
> > ><<< 450 4.7.1 <wang_wz at gdvnet.com>... Can not check MX records for
> > >recipient host gdvnet.com
> > ><user at gdvnet.com>... Deferred: 450 4.7.1 <user at gdvnet.com>... Can not
> > >check MX records for recipient host gdvnet.com
> > >
> > >if an MX record truly exists for this domain why can't my DNS find it?
> > > is it my problem or his?
> > An MX record is not required to exist. <snip>
> > you have a misconfigured mail server.
> > Danny
>so the problem cannot be solved via DNS?
There is no requirement that there be an MX record defined for an SMTP Server.
If there is no MX record, the MTA should attempt to deliver it directly to the
given address. This is not an DNS problem. You need to fix your sendmail
rule requiring an MX record.
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