> I would like to advertise my list in several publications and track the
> response I get from each publication. I thought of asking the subscriber to
> put a code from the publication in the subscription request -- maybe in the
> subject or the second line. Will I, as the owner, see this code when I'm
> notified of a new subscriber.
If you really want it to be foolproof, you have lots of time, and you
maintain your own system, you can use plus-addressing. If you advertise
an address like this:
your sendmail (or whatever MTA you have) could interpret this and
deliver to majordomo. Majordomo would then have a procmail script
that would keep track of which publication code was used and forward
the message to the "real" majordomo.
Here's a URL if you want to know more. If this doesn't make sense,
then it's probably too much work.