How to send confirmation emails with devise?

Question

Here is my user model:

class User < ApplicationRecord
  # Include default devise modules. Others available are:
  #  :timeoutable, :trackable and :omniauthable
  devise :database_authenticatable, :registerable, :recoverable, :rememberable, :validatable
end

How should I configure devise to send confirmation emails when the user signs up?

Answer 1

For production, you need to configure a third-party email sending service, like sendgrid. Example:

1. register on heroku.com
2. push the your local app repo to github.com
3. heroku create
4. heroku rename your-app-name
5. git push heroku master
6. heroku run rake db:migrate
7. heroku addons:create sendgrid:starter

environment.rb:

ActionMailer::Base.smtp_settings = {
  :address => 'smtp.sendgrid.net', 
  :port => '587', 
  :authentication => :plain, 
  :user_name => ENV['SENDGRID_USERNAME'], 
  :password => ENV['SENDGRID_PASSWORD'], 
  :domain => 'heroku.com', 
  :enable_starttls_auto => true 
}

production.rb:

  config.action_mailer.default_url_options = { :host => 'your-app-name.herokuapp.com', :protocol => 'https' }
  config.action_mailer.perform_deliveries = true
  config.action_mailer.delivery_method = :smtp

That way you will be able to send/receive all devise emails in production

Details: https://devcenter.heroku.com/articles/sendgrid