I have set the following confirmation message.  I am thinking that we use this initially, and then convert it to a more generic welcoming one after a week or two.

I am also not seeing a way to set up templates, but I don’t have access to list settings, so they may be in there.

"Welcome to the new and improved LLTI mailing list!  Due to technical problems over the summer, we’ve moved LLTI to a new service, and we have migrated your account. To post, simply email llti@lists.iallt.org.”

Thomas Garbelotti | Instructional Technology Coordinator
UCLA Center for Digital Humanities

http://cdh.ucla.edu/