def stop(self, timeout_seconds=<NUM_LIT>):
self.server.shutdown_server()<EOL>threading.Thread.join(self, timeout=timeout_seconds)<EOL>if self.isAlive():<EOL><INDENT>print("<STR_LIT>")<EOL><DEDENT>
Stop the mail sink and shut down this thread. timeout_seconds
        specifies how long the caller should wait for the mailsink server to
        close down (default: 5 seconds). If the server did not stop in time, a
        warning message is printed.