S/MIME has been a universal standard in securing email for very long time, and rightfully so. But most of its usages has been in the business world, not the public realm.

Like S/MIME, the configuration and maintenance of PGP can be a time consuming pain. There's an additional requirement to maintain your private key in a less standardized way.

S/MIME isn’t necessarily the best method to use, but it’s a stable, open standard and probably the most common e-mail encryption method I’ve seen in use. [ Die, unknown executable!

Other researchers behind the PGP and S/MIME research include Damian Poddebniak, Christian Dresen, Jens Müller, Fabian Ising, Simon Friedberger, juraj somorovsky, and Jörg Schwenk.

Most S/MIME clients don’t make it easy to create rules that enable S/MIME for some recipients and not for others. It’s either all or nothing, or it’s manual.

S/MIME is an end-to-end email encryption standard that allows email clients to scramble the contents of an email before it's sent over the internet using a personal certificate.