Today I received a fourth "FAST-REPORTING: Daily error monitoring report" which I began receiving on Saturday, 12:01am.  

The critical text that I am most concerned about is the last paragraph (see note excerpt below) - ie, that these 42 subscribers will be deleted when delivery errors have been reported for 4 days - which means TODAY!!!   

Why is this happening and how can I prevent the deletions (other than re-subscribing them all after they have been deleted!)?

Laura Biasci 
Information Technologies
University of South Florida 
4202 East Fowler Avenue - SVC4010
Tampa, FL 33620-6940
PH: 813-974-6952 
[log in to unmask]

EXCERPT OF ERROR MSG:
        The following 42 subscribers are currently being monitored:

        Err First Last  Address
        --- ----- ----- -------
          1 05/09 05/09 Yvonne XXXXXX <[log in to unmask]>
                        Last error: 5.1.1 No such local user

(Note: 41 subscribers had the above info, only 1 subscriber had the following error listed:)

         Last error: 5.1.1 Mailer BOOKSTORE.USF.EDU said: "550 Unable to
                                    relay for [log in to unmask]"

        Subscribers will be automatically deleted from the list when delivery errors have been  reported for a  period of  4 days or  more, or when  100 delivery errors have  been received,  whichever occurs  first. Monitoring  will cease after 5 days without any reported error.