when I send email to not existing domian (like gmil.com) message is queded and delayed, not deffered. Problem is that notification about undelivery is send after 4 days (when gwia give ups to reliver message).
Is there wa to notify user that his meesage has been delayed (its mostly simple typos in domain names). I know "Return notification to sender when message is delayed" option, but it notify evey time when gwia fails to send message, so user get info about his mistake every 20 minutes through 4 days.

What I mean is something like "I coundn't deliver messaage because 'domain not found'. I will try to send it next '4 days' and I will let you know if I fail"