So I'm in the process of securing a lease on a new house along with 4 other people. We got a phone call from our potential landlord letting us know that someone replied to his craigslist post with the Subject: "Do not rent to Jane Smith" and the body read "awful tenant". (obviously the name has been changed). What is the legal recourse here? Is there any? Any advice? A friend suggested that we email back demanding a retraction or we will pursue legal action. Is this silly if all we have to go on is an email address? I appreciate all replies.