Sendmail error: Domain must exist

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4 total messages Started by Paul Black Tue, 14 Jul 1998 00:00

#3674

Author: Paul Black
Date: Tue, 14 Jul 1998 00:00

37 lines
2071 bytes

I'm running Bind 8.1.2 and sendmail 8.9.1 on Linux and I seem to have
a problem receiving non-spam emails!

Emails that I receive that have a hostname after the "@", such as spam
from iname.com are received fine. Emails from domains that are not
hostnames, such as rrl.co.uk and madge.com, are rejected with the
message: "Sender domain must exist".

Querying DNS shows that the nameserver information is present but
no information about MX records.
E.g.
paul@darwin> nslookup
Default Server:  localhost
Address:  127.0.0.1

> set q=any
> madge.com
Server:  localhost
Address:  127.0.0.1

Non-authoritative answer:
madge.com       nameserver = NS0-M.DNS.PIPEX.NET
madge.com       nameserver = NS1-M.DNS.PIPEX.NET
madge.com       nameserver = NS.madge.com

Authoritative answers can be found from:
madge.com       nameserver = NS0-M.DNS.PIPEX.NET
madge.com       nameserver = NS1-M.DNS.PIPEX.NET
madge.com       nameserver = NS.madge.com
NS0-M.DNS.PIPEX.NET     internet address = 158.43.129.77
NS1-M.DNS.PIPEX.NET     internet address = 158.43.193.77
NS.madge.com    internet address = 194.129.140.2


Any ideas?

Paul

Re: Sendmail error: Domain must exist

#3675

Author: Barry Margolin
Date: Wed, 15 Jul 1998 00:00

40 lines
2326 bytes

In article <35ABBDBE.4E2B5397@waffle.blah.nu>,
Paul Black  <paul@waffle.blah.nu> wrote:
>I'm running Bind 8.1.2 and sendmail 8.9.1 on Linux and I seem to have
>a problem receiving non-spam emails!
>
>Emails that I receive that have a hostname after the "@", such as spam
>from iname.com are received fine. Emails from domains that are not
>hostnames, such as rrl.co.uk and madge.com, are rejected with the
>message: "Sender domain must exist".
>
>Querying DNS shows that the nameserver information is present but
>no information about MX records.
>E.g.
>paul@darwin> nslookup
>Default Server:  localhost
>Address:  127.0.0.1
>
>> set q=any
>> madge.com

Don't use an "any" query, since that just shows you what happens to be in
your server's cache.  If you want to see MX records, use "set q=mx".  I
generally use the "host" command:

pasilla:~#97% host madge.com
madge.com mail is handled (pri=50) by inet.dev.madge.com
madge.com mail is handled (pri=100) by fallback.mail.pipex.net
pasilla:~#100% host rrl.co.uk
rrl.co.uk mail is handled (pri=40) by relay2.mail.uk.psi.net
rrl.co.uk mail is handled (pri=5) by mail.rrl.co.uk
rrl.co.uk mail is handled (pri=20) by mx3.mail.uk.psi.net
rrl.co.uk mail is handled (pri=40) by relay1.mail.uk.psi.net

I don't know why your sendmail is complaining about these, as they look
fine to me.

-- 
Barry Margolin, barmar@bbnplanet.com
GTE Internetworking, Powered by BBN, Cambridge, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.

Re: Sendmail error: Domain must exist

#3676

Author: Paul Black
Date: Wed, 15 Jul 1998 00:00

10 lines
1409 bytes

Barry Margolin <barmar@bbnplanet.com> wrote:
> Don't use an "any" query, since that just shows you what happens to be in
> your server's cache. 

That's kind of what I was trying to show. It appears that if a hostname
is being looked up then all is well. If it's a domain with MX records
then sendmail appears to only accept the mail if the MX records are
already in the local name server.

Paul

Re: Sendmail error: Domain must exist

#3673

Author: Paul Black
Date: Fri, 24 Jul 1998 00:00

19 lines
1738 bytes

Paul Black <paul@waffle.blah.nu> wrote:
> 
> I'm running Bind 8.1.2 and sendmail 8.9.1 on Linux and I seem to have
> a problem receiving non-spam emails!
> 
> Emails that I receive that have a hostname after the "@", such as spam
> from iname.com are received fine. Emails from domains that are not
> hostnames, such as rrl.co.uk and madge.com, are rejected with the
> message: "Sender domain must exist".

My problem appears to be with the fact that I have "HasWildcardMX" set.
When the reverse lookup is done, MX records are not used because 
there'll be a match against a domain in my search list (*.demon.co.uk).
If I turn "HasWildcardMX" off, then all domains match"

How might I find out if there is a wildcard MX record from the
programming point of view?

Paul

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