The Freecycle groups typically use Yahoo groups to send and receive messages.
There is an Apache Junction list, and East Mesa list, and also lists for Mesa, Gilbert, Chandler, and other nearby East Valley towns.
You can view messages using the following links. But please note, in order to reply to a message or "post" a message (post=send to all members), you will need to join that group.
Freecycle.org , and search for the desired city.