object Mail_Queue_Container::get (
Get next mail from queue. The emails are preloaded into an internal memory buffer to speed up the process. Since Mail_Queue v.1.1, the preload() method doesn't preload ALL the mails in memory, but just a few of them each time. When the buffer is empty, it is filled again automatically. You can set the size of the buffer via the setBufferSize() method.
throws no exceptions thrown
This function can not be called statically.