Those of you who think you can reproduce this...my advice is TRY IT. Try subbing your OWN email address to a list you already sub to (and admin). Try via email and NOTHING will happen at ALL. Try via the tools page and you will get an error message. Try it before telling us it can be done. Joan In a message dated 1/29/2013 11:18:15 A.M. Eastern Standard Time, pleblan@aim.com writes: 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. -- 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. -- ------------------------------- To unsubscribe from the list, please send an email to LISTOWNERS-request@rootsweb.com with the word 'unsubscribe' without the quotes in the subject and the body of the message