Here we are back at the varying definition of &quot;security&quot;.<p>The encryption will defend against NSA style &quot;grab everything, sort it out later&quot; attacks.<p>but it will not defend against targeted attacks where someone had compromised the remote sender somehow.<p>The former is a boon for most people vs the present state, the latter is a hairy problem that has been with us since we first started sorting ourselves into ingroups and outgroups (how do you know that the email is not sent by someone with a gun pointed to their head?).<p>Or as i was reminded by a different comment: perfect becomes the enemy of good.