Dan Goodin reports:
Server-to-server e-mail encryption using the STARTTLS protocol has reached an important tipping point that hardens the majority of messages Facebook sends its users against wholesale snooping by well-financed adversaries, according to figures released Tuesday by site.
The social network said 58 percent of the notification e-mails it sends users are successfully encrypted using STARTTLS.
Read more on Ars Technica.