Delivery Notification: Delivery has failed
For many years I had 2 email addresses - one was the pop email that came with my ADSL account and the other was the one I have with my Apple ID (username@me.com). I have since ended my ADSL connection and closed the account meaning that particular email is no longer valid. I then deleted it from the account settings in the Mail application, and in Internet Accounts in System Preference. To the best of my knowledge I have deleted/removed any reference to this obsolete email address, however when someone sends me an email they receive a 'Delivery has failed' automated response from the old pop account which is closed. This is despite receiving the email that was sent.
Clearly some type of link exists somewhere, or a reference to the obsolete email address, which is causing this issue. I can't just ignore this since everyone is receiving the "delivery has failed" automated response whenever they send me an email, and they think that the true email no longer exists.
Can anyone make a suggestion as to how to solve this problem.
Please note I have an iMac, MacBook Pro, iPad and iPhone all linked.
iMac, OS X Mavericks (10.9), 27"; 2.93 GHz Intel Core i7