You can also import entire email lists in TXT, XML, MDB, and other formats as well, and analyze them to check that all the emails they contain are still valid. The application can verify tens of thousands of email addresses per hour, although it might take more time.
Once the application is done checking all the email addresses, you can export the results in TXT, XML, or CSV format, to view them more easily and in detail.
Email Verifier is a particularly useful application if you need to keep a newsletter list updated. Most users, though, will probably just use it out of simple curiosity.
The trial version only lets you verify 10 email addresses.