update user list details

git-svn-id: svn+ssh://svn.internal.sanger.ac.uk/repos/svn/pathsoft/artemis/trunk@14918 ee4ac58c-ac51-4696-9907-e4b3aa274f04

docs/act_intro_chapter.sgml

@@ -116,7 +116,7 @@ LINKEND="RUNNINGPC"> .
     <PARA> 
 We welcome contributions to &prog; and to &art;, bug reports from users and
 suggestions for new features.  An email discussion list has been set up for
-this purpose.  To join, send a message to 'majordomo@sanger.ac.uk' with
+this purpose.  To join, send a message to 'artemis-users-join@sanger.ac.uk' with
 'subscribe artemis-users' in the body (not the subject).  Announcements will
 also be sent to this list. 
     </PARA>