A warning is in order.
Discussion lists attract false teachers.
On a good list, false teaching will be effectively refuted by faithful Christians. Then you can become familiar with false arguments and learn how to refute them. False teaching can become so rampant, however, that sound Christians are not able to keep up with the sheer volume of error being presented. Because false doctrine often 'sounds good' to the uninformed, discussion lists are dangerous for people who do not know the Scriptures well.