RE: DNS or e-mail Problem ?

["Rene Groothuis" <Groothuis Collis nl>]

I'm sorry, but I wrote in the e-mail I'm very familiar with ... But that's
not true. I mean: I'm NOT very familiar with ....

Rene
-----Original Message-----
From: Rene Groothuis [mailto:Groothuis Collis nl]
Sent: maandag, juli 31, 2000 2:42
To: thomas mandl EUnet at
Cc: redhat-install-list redhat com
Subject: RE: DNS or e-mail Problem ?


Hello Thomas,

Thank you for your suggestion, but I'm not very familiar with the
configuration
of DNS (MX, CNAME etc).

In this mail I've included the zone file and maybe you can give me some more
exact details what the problem is.

Extra information: my ISP is running the DNS service, in other words my ISP
has put my domain name is there zone files.

======== Zone file ===================
@		IN	SOA	server1.mydomain.nl.	webmaster.mydomain.nl. (
			2000073001 ; serial
			86400 ; refresh
			3600 ; retry
			3600000 ; expire
			86400 ; default_ttl
			)
www		IN	CNAME	server1
ftp		IN	CNAME	server1
smtp		IN	CNAME	server1
pop3		IN	CNAME	server1
telnet		IN	CNAME	server1
mail		IN	CNAME	server1
localhost		IN	A	127.0.0.1
server1		IN	A	x.x.x.x     <<=== real ip address of mydomain
local1		IN	A	192.168.1.1
@		IN	MX	5	mail
@		IN	NS	ns.mydomain.nl.

Thanks in advance.

Kind regards,
Rene Groothuis


-----Original Message-----
From: tma relay8 Austria EU net [mailto:tma relay8 Austria EU net]On
Behalf Of Thomas Mandl
Sent: maandag, juli 31, 2000 12:34
To: Groothuis Collis nl
Cc: redhat-install-list redhat com
Subject: Re: DNS or e-mail Problem ?


Rene Groothuis wrote:
>
> Hello All,

Hi Rene,

> I have a problem and I don't know the solution for it. I want to send
e-mail
> from a windows machine which is connected to a Linux server and the Linux
> server is connected to the internet. I get, have found to errors:
>
> >From the e-mail program:

I'm not sure about the cause of this error, but the return mail denotes,
that the receiving mail host did not 'forward = relay' your message to
the final receipient. Who delivered (or tried to deliver this message)?
Do you run your own SMTP server on your Linux box?

> The message could not be sent because one of the reipients was rejected by
> the server. The rejected email address:          nl Subject '......' etc
etc
> ....... Server Response '551 we do not relay', port: 25, Secure (SSL): No,
> Server Error: 551, Error Number 0x800CCC79

This one points out that you have used a CNAME for your MX record in
your DNS server zone configuration files. ***Never use CNAMES for MX or
SOA records!!!*** Correct this and try sending your mail again. It is
possible that this might correct your previous problem, since the
receiving host will run the (E)HELO protocoll and does kind of a reverse
MX lookup for the sending host (and if the MX record for the sending
host is not correct or is a CNAME record) it will fail.

> And in de messages log file I see the following error:
>
> ..... named[3823]: sysquery: findns error (NXDOMAIN) on ns.mydomain.nl?
> ..... named[3823]: "MYDOMAIN.NL IN MX" points to a CNAME
(mail.mydomain.nl)
>
> Can somebody tell my why I get these kind or errors??
>
[...snip...]
Hope this helps
bye and best regards
Thomas
--
Ing. Thomas Mandl, UNIX and IT-Security Consultant

e-mail  : Thomas Mandl EUnet at
WWW     : http://members.EUnet.at/thomas.mandl (under construction!)
PGP     : PGP/GNUPG available on request
Phone   : +43 (0) 676/53 60 497 (Cellular Phone)

-----BEGIN GEEK CODE BLOCK-----
Version 3.1
GE/CC/CS/CM d-(+) s+++:++ a C++++$ US++++$ UL++++$ P++++ L+++ E++>+++
W++>+++ N++ w--- !O !M V-- PE PGP-(++) t++>+++ 5++ X++ R* tv  b+ DI++
D++ G++ e++ h* r++
------END GEEK CODE BLOCK------




--
To unsubscribe: mail redhat-install-list-request redhat com with
"unsubscribe" as the Subject.