A generic connect method that takes no parameters. Subclasses can implement the appropriate authentication
schemes. Subclasses that need additional information might want to use some properties or might get it
Most clients should just call this method to connect to the store.
Close this service and terminate its connection. Any Messaging components (Folders, Messages, etc.) belonging to
this service are invalid after this store is closed. Note that the store is closed even if this method terminates
abnormally by throwing a MessagingException.