1. end-2-end encrypted emails for managed users registered with the
same email domain (internal users). From the docs I understand that either
PGP or S/MIME is used.
If your internal users are using the same e-mail system then e-mails between them most
likely won't even hit the ciphermail gateway to even perform any type of encryption.
2. For the internal users to send secure email
to any other external
email address (other domains). From the docs I understand that WebMail or
PDF is used.
The options to send e-mail from internal to external are encrypted PDF, S/MIME and PGP
3. Simple remote installation/setup and users' usage (people with 0
S/MIME for sure will require some basic knowledge of using the PC in order to install
certs on their PCs. I haven't used PGP but I understand that it functions very similar
to S/MIME. In my experience using ciphermail on customer installation is as follows:
If there are external users that you internal customer will be e-mailing on a regular
basis and those e-mail must be encrypted, you would set those external users in ciphermail
beforehand with mandatory encryption. I would recommend PDF encryption with a static
password that you give those external users. If you want to go the route of S/MIME or PGP
you will have to get involved with installing/configuring certs on those users PCs if we
are talking about users with little or no tech experience. I've done it before and
it's a pain. Biggest issue I've ran into is the expectation for the external users
to be able to encrypt back to my internal users. Ciphermail will handle that but the
external user has to be able to remember to encrypt those e-mail using s/mime or PGP from
their end using their e-mail client (outlook etc...).