tracking the response

[Frank Rizulo <rizulof @ newschool . edu>]

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.  

Is there another or better way to accomplish this?

Thank you,
Frank Rizulo
rizulof@newschool.edu