PSKKeySource (SecureMail Adapter)
Specifies PSK key source type.
PSK Key Source
Use this property to specify the type of the PSK key source.
The certificate contained in a file can be specified in two different ways. One is to set PSK Key Source to File, and assign file name to the PSKKeyValue property. Another way is to use SSLSuitePSKKeyFile property. If the latter property is not empty, the contents of PSK Key Source is ignored.