title: jars for mass email sending
body: <p>in my webapplications whihc runs on tomcat on widows i want to send email to many different people
  for example whenever a new tutials is uploaded on my site an email shold go to all the registed user on my site.
  simlarly whenever some other event occors i need to send the email to some selected users whose emailid are picked up from database.
  I want a jar which can be used to send such messages.
  I wil pass a array of receipienst to it.
  are there some free jars available for this ??
  jars shold me able to queue the msgs and send to the recipients
  let me explain in detail</p>