JavaMail : Altering the From field

There are 2 APIs on the MimeMessage Object, sentSender and setFrom. If you are thinking that the Sender address would go in to the From Address field and using the setAddress field to set it, that would not work. It only sets the RFC 822 "Sender" header field. It does not alter the "From" Header which is used to show the From Address on the email. The code you should be using would look like the following

 MimeMessage message = new MimeMessage(session);

 message.setFrom(new InternetAddress("support@mydomain.com"));
 message.setSubject(subject);
 message.setContent(body, "text/html");
 message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));

 Transport.send(message);