The mailing list for listmasters using Sympa

["Joseph Parker" <address@concealed>]

I have recently set up a sympa listserve box on fedora core 7.  I have only one problem.  I can sign up to the listserve and I get an email with my password.  I called my list address@concealed.  When I send a message to this email address sendmail accepts the message but it is never sent out to the subscribers.  It is never archived either.  What do I need to check?  Thanks in advance for any help that anyone can offer.