Recently I am getting on one of my email addresses hundreds of return (block emails to people I don't know about a topic I know nothing about.
in reading the returns I've discovered most if not all come from one IP number. Is there a service I can go to and type in that IP addresses and have it blocked or shut down?
MacBook Pro (17-inch Mid 2010), OS X Mountain Lion (10.8.4)
have you just changed the password to see if the activity has stopped?
Someone might have hacked into one of your friends' addressbooks and is using your email address to send out spam - happens frequently unfortunately (has to be several times on my Yahoo account). As they already have your address, it's a bit late to do anything except change the password. If it becomes too annoying, you'd need to abandon/delete that email address and start over with another.
Your address was forged by a spammer. Create a Mail rule that deletes the bounce messages.
Someone has taken over one of my email addresses I know one of the IP addresses
