This is unfortunately quite a regular occurence these days.
Someone out there (a spammer) is sending spam email with your email address as the 'from' address.
It is very easy to do and it means that all the bounces (where they have sent emails to invalid addresses for example) will bounce back to the 'spoofed' from address i.e. you.
There's little you can do about it other than protect your email address to whatever degree you can so the spammers don't get it in the first place.
If you are [email protected] you are going to struggle to do that!