[Mailman-Users] mass change the domain name of user email addresses

[Dave Bevis]

Is there a script out there or a mailman command that will let me  
change the domain part of all email addresses to a different domain  
in all lists? i.e. person1 at companyA.com changes to  
person1 at companyB.com, person2 at companyA.com changes to  
person2 at companyB.com, etc. in all lists and makes the change to all  
email addresses that have a domain of companyA.com

Thanks.

Dave Bevis