BrowserSpy.dk shows you just how much information can be retrieved from your browser just by visiting a page.

Available tests are listed below.

Email Address Verification Information

Find out if your email address can be verified? Some mailservers are setup so that the validity of a email address can be verified.

Sorry, but I haven't had the time to port this check to the new platform yet. You might want to consider donating so that I can take the time.