When an error occurs while trying to edit the content of an entry on wiki.octave.org, an error message is displayed which asks to send a message describing the error to email@example.com.
Messages to that address bounce back a few days later with the following error:
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of
its recipients. This is a permanent error. The following address(es)
multiple delivery attempts failed
P.S.: I’m not sure if this is the correct place to report this kind of error.