I have a requirement to send a common email to 20000 users from our application. I want to schedule a batch that reads the user email id from a file/table and sends the email.

As my email content follows a template in which I will fill in employee name and other details, is it possible to do some thing like "mail merge" in Java.

So this way instead of sending same mail content one by one to the SMTP server, I will hand over the email template and lis to mail ids.

What is the maximum numbers mails that a SMTP server handle in production? I know this depends on your server capacity. But I just want to know from your experience.

Is there any way to track whether the email is sent successfuly other than catching the exception.

Is there any open source library that handles the bulk emailing.


Thanks