I’m not a big fan of such services, I won’t use it, but I’ll keep a bookmark here, just in case.

Instead of using your email address on the web, click the Throttle button to automatically fill the text box with a unique email address. This keeps your email identity safe, and allows you to shut off that sender’s access to your inbox anytime. Read their mail in a single digest email or in a news reader.—Throttle — Stop Giving Out Your Email Address