I've been using IIS 5 smtp service to send bulk mail (legitimate, not spam), and wrote a utility to scan the badmail folder under inetput/mailroot to clean up any bounced email addresses.
I noticed that at some point IIS no longer wrote to the badmail folder, and is now filling up the event log with junk.
Is there any way to change this? Does anybody have experience with alternate SMTP servers on windows that make it easy to clean up bounces?