Germany's Federal Office for Information Security (BSI) recently announced that 16 million stolen e-mail addresses and passwords were recently uncovered during an analysis of botnets (h/t The Inquirer)
The BSI now hosts a Web page where users can enter their e-mail addresses to check whether or not they were on the list. If an e-mail address matches, an e-mail is automatically sent to that address confirming the breach and providing advice on security measures to take in response.
The Local reports that the breach was discovered in December of 2013, but it took until this week to "make preparations." As of this morning, the BSI's Web page had processed more than 12 million queries and informed 884,000 affected users.