title: Ruby on Rails and Sendinblue via SMTP
body: <p>I would like to use Sendinblue to send transactional email from my Ruby on Rails web application via SMTP.
  I edited <code>config/environments/production.rb</code> as follows:</p>
  
  <pre><code>ActionMailer::Base.smtp_settings = {
    :address =&gt; 'smtp-relay.sendinblue.com',
    :port =&gt; '587',
    :authentication =&gt; :plain,
    :user_name =&gt; ???,
    :password =&gt; ???,
    :domain =&gt; 'fireworks.com',
    :enable_starttls_auto =&gt; true
  }
  </code></pre>
  
  <p>What am I expected to use as <code>user_name</code> and <code>password</code>? My account's username and password or my SMTP keys? Also, am I required to use any gem, like <code>sib-api-v3-sdk</code>, or this gem is useful only for sending email using the Sendinblue API?</p>