Rails ActionMailer SMTP Settings with Environment Variables

#rails

#smtp

#mandrill

#action mailer

When debugging Rails ability of sending email via SMTP with Mandrill it became apparent that you have to be strict.

Reading their docs you'll see.

config.action_mailer.smtp_settings = {
    :address   => "smtp.mandrillapp.com",
    :port      => 25, # ports 587 and 2525 are also supported with STARTTLS
    :enable_starttls_auto => true, # detects and uses STARTTLS
    :user_name => "MANDRILL_USERNAME",
    :password  => "MANDRILL_PASSWORD", # SMTP password is any valid API key
    :authentication => 'login', # Mandrill supports 'plain' or 'login'
    :domain => 'yourdomain.com', # your domain to identify your server when connecting
  }

so you will have to make-sure in your app if you are using environment variables is just like this.

config.action_mailer.smtp_settings = {
    :port           => ENV['SMTP_PORT'].to_i,
    :address        => ENV['SMTP_HOST'],
    :user_name      => ENV['SMTP_USERNAME'],
    :password       => ENV['SMTP_PASSWORD'],
    :domain         => 'example.com',
    :enable_starttls_auto => true,
    :authentication => 'login',
  }

happy mailing

Written by Kyle Welsby

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1 Response

Add your response

Paxa

To have less env variables can pass it in URL format:

if ENV["SMTP_URL"]
  smtp_url = URI.parse(ENV["SMTP_URL"])
  self.smtp_settings = {
    address:   smtp_url.host,
    port:      smtp_url.port,
    user_name: smtp_url.user ? URI.decode_www_form_component(smtp_url.user) : nil,
    password:  smtp_url.password,
    enable_starttls_auto: Rack::Utils.parse_nested_query(smtp_url.query)['tls'].in?(['true', '1', 1, true, 'True', 'TRUE'])
  }
end

over 1 year ago ·