[Mailman-Users] What does this error mean?

[Joshua Erdman]

May 15 19:55:04 2001 (26051) smtp for 1 recips, completed in 0.053 seconds
May 15 19:55:05 2001 (26051) All recipients refused: host not found

"host not found" at the end of the second line.  Is that referring to my
mail server?

Joshua Erdman
Ernest & Allen, Inc.
CIO/Network Systems Administrator
Tel (805) 781-0317
Fax (805) 781-0725
josh at ernestallen.com