I don't know about you. But I'm getting sick of people that don't clean forwarded email before they send them. I get all kind of forwarded email from friends and family that has been forwarded. Everybody's email is prone to spam because it's right there in to: line. Then when you open email in body of message there is other people's email from previous person and so on.
So Congress enacted Can-spam act. It says that senders address and a way to contact them to remove you from list somewhere in email. It's absurd when they enacted something like this when people email's are open to be spamed.
Here are some ways to curb Spam or at lease be able to complain about spam. Otherwise don't complain and have congress enact absurd law like can spam act.
When you forward email go into email body and copy email and paste it in a new email minus people's email's Instead of just hitting forward button on your email program.