You can also unsubscibe from milist by sending email. For example: milist name bikeclub@rpxholding.com then just sent email to bikeclub-unsubscibe@rpxholding.com. You will be sent a confirmation email to make sure you want to unsubscribe, reply to it and you will be unsubscribe from the milist
If you are not infront of your PC and want to access your email, you can always open Webmail (http://webmail.rpxholding.com) on all PC on RPX network and also on Internet Cafe (Warnet)