Is this a dns issue or a sendmail issue

[Kevin Darcy]

Both of the delegated nameservers for tua.cc (ns1.tua.cc and ns2.tua.cc) answer
SERVFAIL (server failure) for an NS query of tua.cc, as does the machine
"tua.cc" itself. tua.cc however, *does* answer an NS query of ns1.tua.cc or
ns2.tua.cc correctly, which implies that your zonefile is messed up, i.e. you
accidentally delegated "ns1.tua.cc" and "ns2.tua.cc" as child zones instead of
listing them as nameservers for tua.cc.

Perhaps it would help if you posted the entire zonefile.

Frankly, I'm surprised BIND even accepted a zonefile without any zone-top
NS records. What version of BIND are you running on these boxes anyway?
version.bind doesn't return anything from tua.cc, so I'm suspecting a really
*old* version of BIND or a non-BIND nameserver.

(And if version.bind is truthful for ns1.tua.cc and/or ns2.tua.cc, you need to
upgrade to BIND 8.2.3 *IMMEDIATELY* for security reasons).


- Kevin

Aiden Taheri wrote:

>        I am running redhat 6.2 with sendmail 8.9.3
> 220 tua.cc ESMTP Sendmail 8.9.3/8.9.3; Tue, 10 Apr 2001 09:42:03 -0700
> Have the following 3 problems
>
> 1.   when checking messages,  or sending messages it takes about 20 seconds
> for any process to be executed. When I telnet on port 25 I get:
> 220 tua.cc ESMTP Sendmail 8.9.3/8.9.3; Tue, 10 Apr 2001 09:42:03 -0700
> about 20 seconds later
>     The hardware is adaquate, the connection is cablemodem to cablemodem,
> this problem exists to both my inside users and ouside users (firewall)
>
> 2.  I recieve some mail but others bounds, for example I send and email to
> ataheri at tua.cc from a hotmail account and I get it, but when I send a
> message to ataheri at tua.cc froma a yahoo account, it bounces back stating
> "unknown host."   The DNS servers is also running on the same machine, the
> DNS seems to be working properly, but I am not an expert on DNS.
>
> 3. I have an alias aiden at persianprince.com that forwards all emails to
> ataheri at tua.cc, when I send a message from hotmail to
> aiden at persianprince.com I dont recieve and email's bouncing but I also don't
> recieve the email in the ataheri at tua.cc account either, I have checked the
> maillog file and have not seen any errors, of course I am not sendmail
> expert either
>
> Is there a DNS setting I am missing?
> My current settings are
>
> tua.cc.      MX   5     tua.cc.
> tua.cc.      IN     A    tua.cc.
> can someone run some checks and make, since I am no DNS expert, to see if I
> can rule out DNS, this would help focus my attention towards only one
> possibility rather than two.
> Your help would be greatly appreciated,
> Aiden