Is massive spam coming from me on python lists?

[Brian Vanderburg II]

I've recently gotten more than too many spam messages and all say 
Sender: python-list-bounces+my=email.address at python.org.  I'm wondering 
if my mail list registration is now being used to spam myself and 
others.  If so, sorry, but I'm not the one sending messages if other are 
getting them even though Sender seems to include my address (I'm not 
sure about mail headers so I don't know how From: is different than 
Sender:)  Anyway, it seems to be a bunch of spam emails about cracks and 
stuff.

Brian Vanderburg II