Facebook Messages - Computer Definition
A unified messaging feature added to Facebook in 2010. Integrating e-mail and instant messaging, it provided a conversation thread for the same person no matter which method was used. By default, only friends and their friends came into the inbox. Members were allowed to have a FacebookUserName@facebook.com e-mail address, but the e-mail service was dropped in 2014. E-mail messages sent to a facebook.com address are forwarded to the member's primary account at another e-mail service. See Facebook Messenger and WhatsApp Messenger.