One Question...

This seems Strange.
I am receiving in my yahoo email - emails that appear to have been sent from my own email address ! In the Sender box is my own email address. How can this be ? They are always some type of advertisement.
Can you tell me how someone could do this and more importantly, how I can stop this.

Thank You.

You can’t stop it. It’s just spam.

See this:

THANK YOU so much for replying and for the Link.
This was very enlightening.
I will be making doubly sure to never open any unknown emails.

You’re welcome.

If you want to be even more careful then read this: