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Test Driven Development, or...
Setup your development environment.
Configure your production server.
Learn how to modify production to run websockets.
Learn how to handle inbound emails in your Rails application and use them to create comments in your app
Learn how to send emails to a local SMTP server called Mailcatcher for testing and designing emails
Setup Rails to send emails over SMTP using your Sendgrid account
Learn how to send email notifications to users with Rails 4.2 ActionMailer, deliver_later, and email previews
Advanced techniques on sending emails over SMTP with local views and Mandrill's API with remote templates
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