No they are soft bounces, as the email address was recognized, but the message bounced back undelivered instead of reaching the recipient's inbox. An example of the emails I have received in the bounce back email account are:-
Reporting-MTA: dns;Royalmailgroup.com
Received-From-MTA: dns;ME141AAAPP01.uk.consignia.com
Arrival-Date: Fri, 6 Nov 2015 22:16:56 +0000
Final-Recipient: rfc822;jverrall@mgd.royalmailgroup.com
Action: failed
Status: 5.1.1
Diagnostic-Code: smtp;550 5.1.1 RESOLVER.ADR.RecipNotFound; not found
AND
Reporting-MTA: dns; mx.secure.ifl.net
Arrival-Date: Fri, 6 Nov 2015 19:56:20 GMT
Final-Recipient: RFC822;
stevehowell@nobel.herts.sch.uk
Action: failed
Status: 5.4.6
Diagnostic-Code: SMTP; 554 5.4.6 Too many hops
Last-Attempt-Date: Fri, 6 Nov 2015 20:03:22 GMT