
Mimecast misses the point
Cisco has a terrible reputation when it comes to security as well, previously shipping products with nerfed (40-bit) encryption to international customers at the request of the US government. Also, lets be honest here, everyone offering a service which is Internet based (and open to all) will be compromised at some point.
It has happened to big names too including Microsoft, Facebook, Twitter and Red Hat. Not to mention backdoors inserted as part of PRISM. At least since the SolarWinds attack has made big news, so now they will be bolting everything down tightly...