Mashable.com: Facebook’s facial-recognition acquisition raises privacy concerns When users send an e-mail to your Facebook.com address, it pops up in your Facebook inbox.

Facebook ventured into the e-mail field in November 2010, adding the service to the messaging system already used heavily by its 1.2 billion users.

Facebook users - some of whom may not have known they have an "@facebook.com" e-mail address - saw that address set as the default on their user profiles over the weekend.

Screenshot by Jason Cipriani/CNET Next to your personal e-mail you should see a crossed out circle. Change that to the open circle, like the one next to your Facebook e-mail address.

Facebook's new unified e-mail and its implementation is causing unwanted changes to users' address books; worse, the changes have gone unnoticed by users and vital communication is being lost.

Facebook user Matt Brezina, a San Francisco resident and CEO of mobile app company Sincerely, said that he was unaware of e-mail being sent to his new @facebook.com address.

Here are four Facebook notifications that arrived in my e-mail inbox recently. Can you tell which are real and which are fake? Written by Ed Bott, Senior Contributing Editor Aug. 28, 2011 at 7:59 ...

Nobody wants an e-mail address like 123456789@facebook.com and Facebook can’t just assign e-mail addresses based on people’s first and last names since there are too many duplicates.

Code-named Project Titan, the new e-mail service is expected to be announced Monday at a special Facebook press event during the Web 2.0 Summit in San Francisco.

Facebook announced Monday that it is building a full-fledged e-mail system into its 500-million-member social network. Facebook CEO Mark Zuckerberg said the new e-mail offering will be introduced ...

You can then hide your Facebook email address from the contact page and elect to highlight another e-mail address. Mashable.com: Friendthem plans to sue Facebook for ‘find friends nearby’ feature ...

Facebook’s 500 million users will be able to get an @Facebook.com e-mail address that will allow them to communicate within and outside the Facebook network.