JavaMail mail.smtp.ssl.enable is not working

jakarta-mail, java, ssl

Solution

To use SSL you should change your protocol from SMTP to SMTPS by changing

trnsport = session.getTransport("smtp");

to

trnsport = session.getTransport("smtps");

Problem

I read on several sites that, when using the JavaMail API, to set the property `mail.smtp.ssl.enable` to true. I have some code as follows: ``` props.put("mail.smtp.host", "exchangemail1.example.com"); props.put("mail.from", "myemail@example.com"); props.put("mail.smtp.starttls.enable", "true"); // I tried this by itself and also together with ssl.enable) props.put("mail.smtp.ssl.enable", "true"); Session session = Session.getInstance(props, null); MimeMessage msg = new MimeMessage(session); msg.setFrom(); msg.setRecipients(Message.RecipientType.TO, "me.at@example.com"); // also tried @gmail.com msg.setSubject("JavaMail ssl test"); msg.setSentDate(new Date()); msg.setText("Hello, world!\n"); props.put("mail.smtp.auth", "false"); Transport trnsport; trnsport = session.getTransport("smtp"); trnsport.connect(); msg.saveChanges(); trnsport.sendMessage(msg, msg.getAllRecipients()); trnsport.close(); ``` This sends email, but: - when I do traffic capture, I see it is not encrypted - When using debug (`props.put("mail.debug", "true")`), I see that "isSSL false" (I also tried above adding in `props.put("mail.smtp.auth","true")` + user/password....) Any ideas what I am doing wrong?

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