Detecting soft vs. hard bounces
Is it possible for Kentico to include or to look at the smtp reply codes when looking at the bounced emails, instead of only using the special key. This will mean that the task will look in the specified mailbox and look at the SMTP code and determine the type of bounce. Using these codes we can identify between a soft bounce and a hard bounce and most probably unsubscribe an email with a hard bounce. http://www.greenend.org.uk/rjk/tech/smtpreplies.html
Considering for next releases.