Several times in the past few months our daily error monitoring reports have listed addresses that have generated as many as 400 bounces--even though we're set for automatic deletion after 75. Can anyone explain to me why ListServ doesn't delete these addresses as it does others? Here's the latest, which I deleted manually this morning: The following 16 subscribers are currently being monitored: Err First Last Address --- ----- ----- ------- 214 04/20 05/27 [log in to unmask] Last error: smtp; 550 <[log in to unmask]>... User unknown Subscribers will be automatically deleted from the list when delivery errors have been reported for a period of 12 days or more, or when 75 delivery errors have been received, whichever occurs first. Monitoring will cease after 13 days without any reported error.