MX question

Mathias Körber mathias at koerber.org
Mon Nov 13 03:01:01 UTC 2000


> This doesn't quite make sense...can anyone clarify what's happening?
>=20
> My friend has an email address at idcap.com. =20
>=20
> Everytime I try to mail the guy, I get this bounce message:
> "Sorry, I couldn't find any host named idcap.com. (#5.1.2)"

The DNS looks ok from here too. COuld be some mailer misconfiguration?

a) Is that error from your own machine or from some other mailer
   somewhere else?

b) Can you do a normal DNS lookup for his domain, w/o specifically
   asking his authoritative server (auth300)? Maybe your =
resolver/forwarder setup is
   broken.

   Try this:
	$ dig idcap.com mx
   or this
	$ nslookup -q=3Dmx idcap.com=20

c) Long shot: There were old Suns which did not (by default) understand
MX records and had to use a special sendmail configuration to look up =
MXen.
Yours is not one of those, by any chance?

>=20
> When I do a lookup for the domain,
> I get the following:
>=20
> Server:  auth300.ns.uu.net
> Address:  210.80.58.74
>=20
> idcap.com
>         origin =3D auth300.ns.uu.net
>         mail addr =3D hostmaster.uu.net
>         serial =3D 4
>         refresh =3D 21600 (6H)
>         retry   =3D 3600 (1H)
>         expire  =3D 1728000 (2w6d)
>         minimum ttl =3D 21600 (6H)
> idcap.com       nameserver =3D auth300.ns.uu.net
> idcap.com       nameserver =3D auth301.ns.uu.net
> idcap.com       preference =3D 20, mail exchanger =3D =
noteshk.idcap.com
> idcap.com       preference =3D 10, mail exchanger =3D notes.idcap.com
> idcap.com       nameserver =3D auth300.ns.uu.net
> idcap.com       nameserver =3D auth301.ns.uu.net
> auth300.ns.uu.net       internet address =3D 210.80.58.74
> auth301.ns.uu.net       internet address =3D 210.80.58.75
> noteshk.idcap.com       internet address =3D 203.85.133.2
> notes.idcap.com internet address =3D 203.193.30.2
>=20
>=20
> As you can see, there are two MX records, but there is no A=20
> record for IDCAP.COM,=20
> although I would have figured that this wouldn't have mattered.=20
> Any ideas what's happening
> here?
>=20
>=20
> Thanks,
> Thomas
>=20
>=20




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