S/MIME (for Secure MIME or Secure Multipurpose Mail Extension) is a security process to guarantee the confidentiality and non-repudiation of e-mail. With the S/MIME plugin for WebApp, users now can make use of this functionality.
Please keep in mind that this manual assumes that readers has already knowledge regarding S/MIME and secure e-mail.
If you require more information regarding this subject, Kopano would like to refer you to the following pages:
This manual describes installing and configuring the S/MIME-plugin and also on how to sign and encrypt e-mails.