I too would like the answer to this as I am inundated with mailer daemon telling me that I am sending out hundreds of emails when I am not.

You got a mailer-daemon because you SENT an email to an incorrect or non-existant email account. The solution is not to send emails to that address anymore.

raping little girls

I am having difficulty when replying from a mail received from a supplier it comes back to my mail with a message : mailer-daemon. How can I solve this?

Errors sent by mailer-daemon in most cases occur due to a typing error. You may have exceeded 50 hops in the email you send.