Starting on August 28, I’ve been getting tons of email from people I don’t know, and I wasn’t in the recipient list either. Among the messages I received were the usual e-mail messages to groups of friends as well as e-mail from websites. Yesterday I saw a pattern when two specific recipients’ e-mail addresses were always in the To: line.
I conducted a short experiment: I created email messages to each of the two recipients, and voila, those messages ended up in my inbox! In both cases, the user accounts were changed to forward all e-mail to me.
Is this a new type of spam, or just coincidence?
In both cases I have sent e-mail to abuse@<domain> asking them to turn off the forwarding. We’ll see what happens.
Peter H. Gregory 
Update: Charter Communications is one of the ISPs that is involved in this e-mail forwarding. I reported this to abuse@charter.ca, and they have responded, saying that they are not going to do anything about it, because the problem did not originate from one of their IPs.