Hmmm... I thought that "skip all rules" will mean that bounce handler will treat all emails as bounces and process every email instead of those that only match the rules? The problem is that since I'm in Hong Kong, some of the servers here are in chinese, and send bounces in Big5 or other double byte languages, which are not picked up by the rules... What does "skip all rules" actually do if it doesn't do if it isn't to process all emails?
I did look at the log when it was connecting, and it seems to be deleting the messages, but somehow, some emails would still remain on the server until the next connection from bounce handler... e.g. bounce handler downloads from 1 - 100 mails, even though no new mail seems to be added, there will still be around 50 mails left, then the next time, it will delete about half again, etc...