3% were missing or not delivered at all - with no hard bounce message
or other notification of non-delivery.
the original sender address) for the bounce message
to be delivered.
As a result, the legitimate email user receives a bounce message
for emails that they never sent.
Getting listed because of a bounce message
is completely bogus.
Customizable NDR Messages: Bounce message
text is now customizable and can be created for virus, spam and banned file notifications for both the sender and recipients.
Janulaitis added, "We hope that more businesses and individuals will begin to add domain filters and bounce messages
back to those site.
Top subject lines used by spammers included "Delivery Status Notification (Failure)", "Return mail" and "Undelivered Mail Returned to Sender", correlating with the use of NDR or bounce messages
as a spam vector, but new malware related subject lines also emerged, such as "Notice of Underreported Income" and "Thank you for setting the order No.
It would reduce spam by allowing e-mail providers to bounce messages
with falsified addresses.
If you're unlucky, you will also have been overloaded with bounce messages
from ISPs and corporate mail servers, because your e-mail address has been used as one of Sobig's spoof identities.