I am trying to send emails from Heroku up and running. At the moment I can send emails from Heroku via the \"tutorial\" at http://blog.heroku.com/archives/2009/11/9/tech_sen
Just do as the above user has said about the SMTP settings.
In addition to that, Gmail blocks unidentified logins from a application to your account without you verifying it.
So go to your Gmail client and log in there.