My company routinely deals with government entities that have legitimate security concerns, so it’s not surprising that, sometimes, I receive mail that is digitally signed, or has some encryption component.

Usually, this is done poorly, which is no surprise, because mail encryption is still not seamless. However, yesterday I got a mail that Outlook won’t open at all. Instead, I get this:

The hilarious part of this is that the mail opens fine with no hint of trouble when read from my Mac’s Mail.app client, or from either of my iOS mail clients. Security, Microsoft style!