Bill Deegan writes: 

>> > I get the following when trying to send email through my courier mail server:
>> >
>> > Mar 21 11:46:09 mailbox courieresmtpd: started,ip=[::ffff:192.168.168.101]
>> > Mar 21 11:46:09 mailbox courieresmtpd: 
>error,relay=::ffff:192.168.168.101,from=<[EMAIL PROTECTED]>: 517-Domain does not
>> exist:
>> > hq.knowmadic.com.
>> > Mar 21 11:46:09 mailbox courieresmtpd: 
>error,relay=::ffff:192.168.168.101,from=<[EMAIL PROTECTED]>: 517 Invalid domain,
> see
>> > <URL:ftp://ftp.isi.edu/in-notes/rfc1035.txt>
>> >
>> >
>> > >From  a previous message in the list I saw the sugguestion to check the mx 
>records:
>> > [root@mailbox]# dig hq.knowmadic.com mx
>> >
>> > ; <<>> DiG 9.2.0 <<>> hq.knowmadic.com mx
>> > ;; global options:  printcmd
>> > ;; Got answer:
>> > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4038
>> > ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1
>> >
>> > ;; QUESTION SECTION:
>> > ;hq.knowmadic.com.              IN      MX
>> >
>> > ;; ANSWER SECTION:
>> > hq.knowmadic.com.       86400   IN      MX      0 
>mailbox.hq.knowmadic.com.hq.knowmadic.com.
>> >
>> > ;; AUTHORITY SECTION:
>> > hq.knowmadic.com.       86400   IN      NS      mailbox.hq.knowmadic.com.
>> >
>> > ;; ADDITIONAL SECTION:
>> > mailbox.hq.knowmadic.com. 86400 IN      A       192.168.168.71
>> >
>> > ;; Query time: 1 msec
>> > ;; SERVER: 127.0.0.1#53(127.0.0.1)
>> > ;; WHEN: Thu Mar 21 11:35:36 2002
>> > ;; MSG SIZE  rcvd: 113
>> >
>> > [root@mailbox]# testmxlookup hq.knowmadic.com
>> > Hard error.
>> >
>> >
>> > How come the testmxlookup fails, but dig finds the mx record?

Dig finds a completely fucked up MX record, and obediently prints it. 

testmxlookup ignores all fucked up MX records. 

-- 
Sam 


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