Get the name of this action, i.e. "MailboxStatus".

Get/Set the name of the mailbox to query.
This can either be only the name of the mailbox or a string of the form mailboxnumber@context. If no context is specified "default" is assumed.
Multiple mailboxes may be given, separated by ','. In this case the action checks whether at least one of the given mailboxes has waiting messages.
This property is mandatory.
Example: "1234,1235@mycontext"

Specify a server to which to send your commands (x.x.x.x or hostname).
This should match the server name specified in your config file's "host" entry. If you do not specify a server, the proxy will pick the first one it finds -- fine in single-server configurations.