This section controls what happens to the Reply-To: headers of messages posted through your list.
Beware! Reply-To: munging is considered a religious issue and the policies you set here can ignite some of the most heated off-topic flame wars on your mailing lists. We'll try to stay as agnostic as possible, but our biases may still peak through.
Reply-To: is a header that is commonly used to redirect replies to messages. Exactly what happens when your uses reply to such a message depends on the mail readers your users use, and what functions they provide. Usually, there is both a ``reply to sender'' button and a ``reply to all'' button. If people use these buttons correctly, you will probably never need to munge Reply-To:, so the default values should be fine.
Since an informed decision is always best, here are links to two articles that discuss the opposing viewpoints in great detail:
The three options in this section work together to provide enough flexibility to do whatever Reply-To: munging you might (misguidingly :) feel you need to do.
If this option is set to No, then any existing Reply-To: header will be retained in the posted message. If Mailman adds its own header, it will contain addresses which are the union of the original header and the Mailman added addresses. The mail standards specify that a message may only have one Reply-To: header, but that that header may contain multiple addresses.
When you set this variable to Poster, no additional Reply-To: header will be added by Mailman. This setting is strongly recommended.
When you set this variable to This list, a Reply-To: header pointing back to your list's posting address will be added.
When you set this variable to Explicit address, the value
of the variable
reply_to_address (see below) will be
added. Note that this is one situation where
Reply-To: munging may have a legitimate purpose. Say
you have two lists at your site, an announce list and a discussion
list. The announce list might allow postings only from a small
number of approved users; the general list membership probably
can't post to this list. But you want to allow comments on
announcements to be posted to the general discussion list by any
list member. In this case, you can set the Reply-To:
header for the announce list to point to the discussion list's
reply_goes_to_listis set to Explicit address.