Quartz job to send email using Javamail, but Javamail is synchronous

Question

The title basically sums up my issue at the moment. If I have multiple instances of the Job running at/around the same time, Javamail throws an exception as it's meant to be used synchronously. Is there a way I can make it run asynchronously? Or is there an alternative to Javamail that is asynchronous?

Answer 1

I think there are several ways to deal with such kind of tasks:

1. wrap up into a service which then periodically send batch of emails;

2. send each email in its on thread, i.e. imply separate SMTP connection;

   @Async
   public void sendEmail(String smtpServer, String to,String from,String subject, String body) {
         send(smtpServer, to, from, subject, body);
   }