Spam is being sent with my email address on it!

[#1]

I get a few spam messages re drugs every day.  What concerns me is that they may be using my email address to send these messages to others.  How do I stop them from posting messages with my email address on them?  How do I deal with this?  Any hints?

[#2]

Once a spammer has your email address that is pretty much end of it.  Nothing you can do other make a main account email address for only important things and use the other free email address until they get spammed like this and delete them.  then start a new email.

Another option is to use Gmail and use it as a spam filter in a way.  Use Gmail to read and send emails, but make it forward only the emails you want to you verizon email address.