Someone is using my address to send a spam into my mail. What can I do?

For sometime now, someone has been using my yahoo address to send a spam to the same address. What does this mean and what do I need to do about this problem?Someone is using my address to send a spam into my mail. What can I do?
It is called “spoofing” they are claiming to be from your address to

1. Entice you to open it

2. Slip past your defenses.

You can black list you own email address. for many mail clients you own email does not go through the filtering. While anyone claiming to be you will be stopped.
I don't know exactly the names, but there are programs to detect the source of the e-mails sent. The IT departments in companies can do that. If you know someone in IT, you can tell them and they can tell you exactly which address and computer it was sent from.Someone is using my address to send a spam into my mail. What can I do?
There is currently a virus that is sending your contacts emails, my daughter has it in 2 of her laptops but she said it seems to be through her hotmail account? Run a virus scan or download Google free virus scan PC Tools Spyware Doctor.
Reply to them, go to the bottom of the spam, there should be an unsubscribe link,Someone is using my address to send a spam into my mail. What can I do?
i dunno