I just sent an email to an invalid email address via webmail and this is the bounced email I received:
"This is an automatically generated Delivery Status Notification.
Delivery to the following recipients failed.
*** Email address is removed for privacy ***"

The webmail bounced email doesn't tell me why the email address was bounced.

On the iphone, I open up the same bounced email and I can see the diagnostic info on why the email was bounced:
Final-Recipient: rfc822;*** Email address is removed for privacy ***
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;550 Requested action not taken: mailbox unavailable

How do I see the diagnostic info via webmail?

Original Title: hotmail.com - Delivery to the following recipients failed