[Mailman-Users] setting up mailman on fc6

[Dave]

Hello,
    I'm trying to set up mailman and postfix on an fc6 vps box. The fqdns 
they use are not mine for this domain, which i'm wondering if that's an 
issue. I have edited mm_cfg.py url_hosts set it to www.domain.com and 
email_hosts option to domain.com, i won't be using any virtual domains, at 
least not right away. I've deleted the five lines for automatic fqdn 
acquiring above the url_host line and went to run /usr/lib/mailman/update i 
get a traceback www is not defined. Where do i go from here?
Thanks.
Dave.