HP LaserJet 9000 User Manual page 59

14. You should receive an e-mail from the printer in your e-mail
application's Inbox. (See the screen below.)
Note
Depending on delays in the network and your organization's mail
server, a response may take from one minute to several hours to arrive
back in your e-mail application's Inbox.
If the To:, From:, and Subject: fields are not properly formatted in
your e-mail message, the printer will not send a message in response.
Appendix B – How Do I? 55