[Mailman-Users] Send to list error

[Brian York]

When i try to send to the list i get this error from kmail

Sending failed:
Message sending failed since the following recipients were rejected by the 
server:
servergroup at 10.20.1.163 (The server responded: "5.1.2 unknown host or domain: 
servergroup at 10.20.1.163")
The message will stay in the 'outbox' folder until you either fix the problem 
(e.g. a broken address) or remove the message from the 'outbox' folder.

Brian