I have a web site for my business, and on it I give a contact email address.
This has been fine for year.

Now everyday I get at least 20 email as

"I'm sorry to have to inform you that your message could not be be delivered
to one or more recipients"

or similar

However I did not send any of these emails but the emails appear as if I
have !!!!!

I thought of changing my emails address, but it uses my business name

Is there anything I can do to stop this as the emails are spam and going
everywhere under my name/.

Thank you