ooooh, let me! let me! Newbie. :) Paul L LeBlanc wrote: > > off list person name protected > =================== > Sorry no. > > > That is what you would think. > > But there are many types of data structures that can duplicate keys. > > Only if it an indexed file can you have only one key. > > > PS I first touched a computer in 1969 > > -----Original Message----- > > > Paul, > > I'll let others address this publicly. But my guess is that the email address > is a key field in the database structure used by Mailman, in which case it would > not be possible to have two separate records for the same key field; that should > produce an error message. >