Facebook has a notification feature that sends emails to inform users about comments on posts that they had created or commented on. Today, the company launched a new feature that allows users to participate in these conversations –including status updates, photos, videos and Wall posts — by replying directly through Facebook’s email notifications without having to log into the social networking site.
When users receive an email notification about certain comments or messages, they can now simply click “Reply” and start typing a comment at the top of the email. Once they press “Send”, the reply will automatically be featured as a comment on Facebook.