We have been following a story that appeared recently about vulnerabilities in PGP and S/MIME that can cause a leak of the plaintext content of encrypted emails.

A technical description of the vulnerabilities can be found at https://efail.de/

There are a number of possible mitigations for the vulnerabilities, and they vary in how much they might impact your use of encryption. As we have help pages about how to use encryption with email, we felt we should let you know about these particular vulnerabilities.