Understanding mail failure notices, 554

Posted by goran on Server Fault See other posts from Server Fault or by goran
Published on 2010-03-26T09:14:40Z Indexed on 2010/03/26 9:23 UTC
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I'd like to confirm the meaining of a mail failure notice. Here's the message

Hi. This is the qmail-send program at mydomain.com
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<[email protected]>:
1.2.3.4 does not like recipient.
Remote host said: 554 <[email protected]>: Relay access denied
Giving up on 1.2.3.4

The way I understand this is, that 1.2.3.4 is not setup to receive mail for this domain.

dig domain.com MX shows

;; ANSWER SECTION:
domain.com.     6245    IN  MX  10 mail.domain.com.
domain.com.     6245    IN  MX  20 mx.anotherdomain.com.

(1.2.3.4 is mx.anotherdomain.com.).

The puzzling part is that I have reports that messages sent from gmail get delivered to this address.

P.S. Is this a proper question for serverfault?

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