remote smartermail ssl
if smartermail is local install you can create a SSL for webmail. This doesn't work with remote smartermail.
I would like plesk to introduce this so some kind of agent is running on the server so Plesk can communicate with IIS on the remote web server to copy SSLs and bindings.
Pavel Vasilevich commented
Currently it is only possible if you have Plesk installed on the same box (where remote SmarterMail installed). In this case local Plesk will manage server-wide settings, such as SSL for webmail.
Then you can attach other Plesk servers to this SmarterMail.