We put together a video showing you how to prevent and stop email spammers from flooding your inbox with “Mail delivery failed: returning message to sender” emails from Mail Delivery System.
If your inbox is flooded with emails from Mail Delivery System like you see in the photo below, and if you did not attempt to send any of these emails, which is common when trying to send mass newsletters to email accounts that don’t exist, then you are most likely a victim of email “spoofing.”
How to stop the error “mail delivery failed: returning message to sender” – Video
Is My Email Hacked?
The good news is that in most situations where Mail Delivery System emails are flooding inboxes, the email account in question is usually not hacked. The spoofing attack is done externally and there is a fairly easy way to stop it. Simply watch our video above.
If you have any question or are still experiencing issues with Mail Delivery System Emails, comment below and we will gladly try to help!