public static class SmtpManager.WaitObject
extends java.lang.Object
This Object is used by a thread to wait until a number of emails have arrived.
(for example Server's waitForIncomingEmail method)
Every time an email has arrived, the method emailReceived() must be called.
The notify() or notifyALL() methods should not be called on this object unless
you want to notify waiting threads even if not all the required emails have arrived.