Order confirmation failure notice. How to change e-mail?

My customers do not recive the order confirmation. They get this message:

"Hi. This is the qmail-send program at mx.webhuset.no.
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]:
Sorry, I couldn't find any host named webart.no. (#5.1.2)"

the e-mail addres here is wrong ([email protected]). Where do I change this address to my current address? (I have checked configuration--->e-mail options but could not find it there).

Zen Cart only uses the email addresses in the Admin->Configuration->Email Options ... or the customer's own email address.

Anything else is being added either by your hosting company's server or some addon contribution you've installed.

Yes I figured it out. I had an e-mail forwarding which I had forgotten to deactivate. Thanks for your help.