There's a great piece of software called Kill the Newsletter that converts email newsletters into RSS feeds. Each feed gets a unique email address, and all emails to that address go into its RSS feed. It's open-source so you can self-host it. It's a good way to clean up your email inbox a bit.
I use a different email address for each site I sign up to, for this reason. I have a "catch all" email meaning everything @ my domain goes to the same email account. I found out about the LinkedIn data breach before I saw news reports about it because I suddenly started getting a lot of spam to my linkedin@ address :)