Francis Galiegue <[EMAIL PROTECTED]> writes: > One problem is that not every mailing list management program agrees on what > headers should be defined that identify a message as being sent to a mailing > list. Some use X-Mailing-List, some others use Precedence, some others use > Sender (amanda-users is one of them), etc etc. Mailing list handling is not > enforced by an RFC. > > I've been asked to implement an automatic mail response system at my company > but refused to do so: I couldn't reliably identify bulk messages (mailing > lists) from others reliably. I subscribe to three different mailing lists, > each of which have a different idea of how to announce themselves as being > mailing lists. Heh.
It's pretty straighforward in RFC 3834: if the user's email address actually appears in a To/CC/BCC header, then a response may be sent. Otherwise not. There's no need to determine if there is a mailing list involved.
