I have found some info about saving a message in your FAQ. One point is not clear for me in this answer. Would you please clarify it?

the topic is [briefly]:

			

			---------------
			

			How can I serialize a JavaMail Message?
			

			Author  John Zukowski
			

			Created  Mar 6, 2001
			

			

			Save the contents to an RFC 822 formatted stream (message.writeTo()),
			

			serialize the bytes, and recreate the message at the other end.
			

			-----------------
			

		

			

			ByteArrayOutputStream baos = new ByteArrayOutputStream();
			

			

			try {
			

			InputStream ins = message.getInputStream();
			

			int bytes_read = 0;
			

			// check that we can actually read
			

			byte data[] = new byte[1024];
			

			while ((bytes_read = ins.read(data)) >0) {
			

			baos.write(data, 0, bytes_read);
			

			}
			

			ins.close();
			

			} catch (Exception e) {
			

			System.err.println(LOG_PREFIX + "convertMessage(): " + e);
			

			

			}
			

			

			// convert the buffer into a string
			

			return baos.toByteArray();