You remember that email address @facebook.com that Facebook set up for you in 2010, and then told everyone viewing your Facebook profile to use in 2012 (without asking)?
Well, they are now breaking it:
You received this email because your email@example.com account is set up to forward messages to [personal email address]. After 1 May 2016, you will no longer be able to receive email sent to firstname.lastname@example.org.
Please update your email address for any services that currently send email to email@example.com.
Email Team at Facebook
Good work all round, there, Facebook.