How do I properly setup javamail to use STARTTLS?
The issue I was having with STARTTLS was caused by me getting a secure transport:
transport = session.getTransport("smtps");
After changing it to "smtp" i was able to use STARTTLS.
Knoxie
Updated on June 04, 2022Comments
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Knoxie almost 2 years
When setting up my session I am setting the starttls.enable and .required properties but when the connection happens it should fail according to the documentation:
mail.smtp.starttls.enable boolean If true, enables the use of the STARTTLS command (if supported by the server) to switch the connection to a TLS-protected connection before issuing any login commands. Note that an appropriate trust store must configured so that the client will trust the server's certificate. Defaults to false." http://javamail.kenai.com/nonav/javadocs/com/sun/mail/smtp/package-summary.html
props = new Properties(); props.put("mail.smtps.host", MAILSERV); props.put("mail.smtps.socketFactory.port", 465); props.put("mail.smtps.auth", "true"); props.put("mail.smtps.port", 465); props.put("mail.smtps.socketFactory.fallback", "false"); props.put("mail.smtps.socketFactory.class","utils.DummySSLSocketFactory"); props.put("mail.smtps.quitwait", "false"); props.put("mail.smtp.starttls.enable", "true"); props.put("mail.smtp.starttls.required", "true"); Session session = Session.getInstance(props, authenticator); transport = session.getTransport("smtps"); transport.connect(mailServer, port, username, password); transport.sendMessage(message, message.getAllRecipients());
So what am I doing wrong that is allowing me to use Starttls when its not supported by the server?