[Forums] What transacional email service are you using?

With mandrill you need to have an active mailchimp subscription (it use to be that you can signup and use mandrill as a standalone product, not anymore!)

Mandril is a good product, but if your not going to be creating newsletters and just want a stand alone SMTP solution go with sendgrid or even amazon ses! (UI can do with a little work but it works and works well).