String sender = "test@localhost";
String recipient = "test@localhost";
MimeMessage mm = new MimeMessage(Session.getDefaultInstance(new Properties()),new ByteArrayInputStream(sources.getBytes()));
MailImpl mail = new MailImpl("name",new MailAddress(sender),Arrays.asList(new MailAddress[] {new MailAddress(recipient)}),mm);
rd.service(mail);
while (outgoingSpool.size() > 0) {
Thread.sleep(1000);
}