trying to figure out why mail is bouncing

[Joshua S. Freeman]

So, Ben,

I think I have to make changes in a few places.. help me figure this
out...

there's /etc/named.conf

then, there's /var/named/38.232.199.hosts
and
/var/named/threeofus.com.hosts


any idea where I should be making changes?

J.
On Fri, 31 Oct 2003 bscott at ntisys.com wrote:

> On Fri, 31 Oct 2003, at 9:19am, jfreeman at threeofus.com wrote:
> >> When I did a lookup on the IP address, I got an NXDOMAIN error. There is
> >> apparently no reversae lookup for your mail server.
> >
> > would someone kindly let me know what changes I need to make to my host
> > file in order to fix this?
>
>   The /etc/hosts file has nothing to do with it.  You need to have your ISP
> put a PTR (pointer) entry in the DNS for your IP address.  Or have them
> delegate your IP subnet to DNS nameservers you control.
>
>   Hmmm, I notice that the MX for the domain <threeofus.com> is
> <mail.threeofus.com>, and that <mail.threeofus.com> is a CNAME for
> <threeofus.com>.  Per the RFCs, the right-hand side of an MX record can only
> be the canonical name.  That can cause trouble, too.
>
>   Anyhows, I see you have IP address <199.232.38.4>.  That reverses to
> <4.38.232.199.in-addr.arpa.>.  Following the delegation chain from the
> roots, I see your ISP says <4.38.232.199.in-addr.arpa.> is a CNAME for
> <4.threeofus.com.>.  If you put a PTR record in for that name with RHS
> <threeofus.com>, that should fix things up.  That, and fixing
> <mail.threeofus.com> to have an A record, rather then a CNAME.
>
>

-- 
------
Joshua S. Freeman
jfreeman at threeofus.com