DavidR
3
This is most likely a spoofed From email address (yours) from someone whose computer is infected and they have your email address in their system.
The dumb mail server is simply bouncing the infected email back to this spoofed From email address (assuming you didn’t send it or have any record of it).
Or this is another way to try to get people to open an attachment to see what it is all about, why the email was returned and Bingo you are Infected Too.
Best action here, delete and ignore emails like this and maintain your computer security. Keep avast, anti-spyware and OS up to date.