javax.net.ssl.SSLException when sending mail using JavaMail

Question

javax.mail.MessagingException: Exception reading response;
  nested exception is:
        javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?         


        

Answer 1

If you don't want to use SSL, and you're using smtp instead of smtps try these settings

mail.smtp.starttls.enable=false
mail.transport.protocol=smtp