BUT, if you have multiple Bouncehandler files tracking for different mail domains/accounts, I can't see where it is possible to recover from your suggested logfile because that is from everything it bounced that day (not separated by Bouncehandler file. If I've got 4 files that have been retrieving bounces during the day but one of them crashes, the recovery you suggest would add emails to the crashed file that were not part of the bulk mail delivery.