multi_smtp

MultiSMTP

Email delivery is a critical component of many web applications. Often third-party Email services can experience temporary downtime.

We can achieve automatic failover by overriding the default delivery method with the MultiSMTP class.

Installation

Add this line to your application's Gemfile:

gem "multi_smtp"

And then execute:

$ bundle

Configuration

Set the delivery method to :multi_smtp for each environment that should use the automatic failover.

# config/environments/{staging,production}.rb
ExampleApp::Application.configure do
  config.action_mailer.delivery_method = :multi_smtp
end

In an initializer configure the MultiSMTP class with an array of (1..N) SMTP Providers.

# config/initializers/multi_smtp.rb
sendgrid_settings = {
  address: 'smtp.sendgrid.net',
  authentication: :plain,
  domain: 'hoteltonight.com',
  password: ENV['SENDGRID_PASSWORD'],
  port: '587',
  user_name: ENV['SENDGRID_USERNAME'],
}

other_smtp_settings = {
  # Other SMTP settings
}

MultiSMTP.smtp_providers = [sendgrid_settings, other_smtp_settings]

Contributing

• Fork it ( https://github.com/[my-github-username]/multi_smtp/fork )
• Create your feature branch (git checkout -b my-new-feature)
• Commit your changes (git commit -am 'Add some feature')
• Push to the branch (git push origin my-new-feature)
• Create a new Pull Request