Sometimes somebody subscribes my email to their list without any of my permission which gives him convenience of spamming my inbox. I know there are email extractors but never heard of email subscriber programs. Usually you deal with honest people who had your permission to subscribe to their list but sometimes it's people you have never heard about that send their emails without option to unsubscribe, the link that usually resides on the bottom of permission based marketing emails.
What are other ways to deal with this annoyance except marking it as spam every time? Should I take time consuming option to look through source of email to search for unknown person's email provider and submit complaint? Here can lie another problem and it is where unknown sender uses his own server-side email autoresponder.
Any suggestions or tips?
Edit: How can this question be on hold if SuperUser even has tags for my question?