ShyTorque - the action of "unsubscribing" verifies your email address. The only email you unsubscribe from are the ones who you can lob a brick through their window if they don't. The general rule of internet business is only trade with people whose lapels you can grab to explain what went wrong.
For the future I want to see an email service that requires the sender to fully disclose who they are, where they are, a return email address and a land based, non-premium rate, contact number. If any of these items are missing I don't want the email. It's about time this happened.
PM