The most active WebObjects mailing list is Apple's webobjects-dev (for general WebObjects discussion).
By all means, search and browse these deprecated mailing lists when looking for solutions, but please do not post new messages to the deprecated mailing lists. These lists are considered obsolete and are no longer used. Use the lists detailed above for posting new messages. If you post a message to one of these deprecated lists, very few people will see it. It is like being alone in a dark room asking for help. You have been warned.