You can contact milist owner directly by sending email to him. For example milist name: bikeclub@rpxholding.com then just sent email to bikeclub-owner@rpxholding.com to reach him.
And to get some infos about the milist you can sent email to:
bikeclub-info@rpxholding.com
bikeclub-faq@rpxholding.com
bikeclub-help@rpxholding.com
bikeclub-request@rpxholding.com
