String randomFactor = Integer.toString(100000 +
(new Random()).nextInt(900000));
rfcText = rfcText.replace("Subject: Subject",
"Subject: Unique Subject " + randomFactor);
rfcText = rfcText.replace("Message-ID: <", "Message-ID: <" + randomFactor);
Rfc822Msg rfcMsg = new Rfc822Msg(rfcText);
// create MailItemEntry with appropriate data
MailItemEntry mailItem = new MailItemEntry();
mailItem.setRfc822Msg(rfcMsg);
for (String label : labels) {