[sqwebmail] Nondelivrable notification

[Administrator]

Hello,   it is possible to set up Qmail to act like sendmail regarding nondelivrable notifications?   I want the following: 1. if a message is undelivrable for 4 hours, I want to generate a  notification, and keep trying to deliver for 4 days. 2. after 4 days to delelete the message from queue and generate the nondelivrable notification to sender.   I did the 2. but is there any way to generate the notification state at 1.?   Thank you Cristi