a al owens

a al owens
Barry Margolin <barry.margolin@level3.com> wrote in message news:<be1r80$1kl9$1@sf1.isc.org>...
> In article <be1q4d$1jk4$1@sf1.isc.org>,
> Sang-yong Suh <sysuh@kigam.re.kr> wrote:
> >Browsing my maillog, I found that an outside mail server, where I have
> >an account and forwards to me, accepted mail from an unresolvable domain
> >and has been rejected by my mail server. This caught my eye.
> >
> > Jul 3 10:18:53 news sendmail[26771]: h631FqVl026771:
> > ruleset=check_mail, arg1=<freed_av@worldonline.fr>,
> > relay=xxxxxx.xxxxxxx.re.kr [xxx.xx.30.253],
> > reject=451 4.1.8 Domain of sender address
> > freed_av@worldonline.fr does not resolve
> >
> >The relay mail server uses bind 8.3.3-REL.
> >My internal mail server runs bind-9.2.2.
> >
> >The problem is that the sender address freed_av@worldonline.fr is
> >unresolvable on bind-9.2.2 but is resolvable on 8.3.3-REL.
> ....
> > host version dig dig +trace
> >
> > 134.75.144.201 9.2.2 unresolvable timedout
> > 134.75.144.204 9.2.2 unresolvable timedout
>
> These two servers don't have recursion enabled. You shouldn't be using
> them to try to look up domains they're not authoritative for.
>
> Check the "flags" section of the response from your other 9.2.2 servers,
> and make sure it has "ra" (Recursion Available).