error: Host unknown, please help!

Tilman Schmidt Tilman.Schmidt at
Fri Mar 31 11:01:13 UTC 2000

At 08:58 30.03.00 -0800, Jeremy wrote:
>Whenever I send a message to mail to user123 at I get a return
>response from *somewhere* with the "Transcript" of:
>550 mailto:user123 at  Host unknown (Name server:
> no data known)

Your obfuscation of the real information makes a diagnosis rather
difficult, so I may be completely wrong, but the little that's left
looks like your zone file for contains a line like:

@       MX 10 my.ip.add.ress

That is, you wrote the IP address instead of the host name of your
mail server into your MX record.

Tilman Schmidt          E-Mail: Tilman.Schmidt at (office)
Sema Group Koeln, Germany       tilman at (private)

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