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copied!<p>This idea won't scale much - you'd need to implement something like <code>Resque</code> and workers to process sending all the emails out.</p> <p>Yes, @socjopata's idea is good, but you'll really want to iterate adding them to the job queue and spawn a couple workers to process them. As per the guides, this is how to do it:</p> <pre><code>class AdminMailer < ActionMailer::Base default :to => ["foo@bar.com", "bar@foo.com"], :from => "notification@example.com" def new_registration(user) @user = user mail(:subject => "New User Signup: #{@user.email}") end end </code></pre> <p>I'd essentially hand of <code>YourMailer.feedback_mail(<PASS ARGS HERE>).deliver</code> to Resque-</p> <pre><code>Resque.enqueue(SendMail, <ARGS>) # replace this in your controller </code></pre> <p>The worker would look like</p> <pre><code>#send_mail.rb class SendMail @queue = :feedback_mail_queue def self.perform(<ARGS>) # pass these in enqueue call YourMailer.feedback_mail(<PASS ARGS HERE>).deliver end end </code></pre> <p>As per <a href="http://guides.rubyonrails.org/action_mailer_basics.html#complete-list-of-action-mailer-methods" rel="nofollow">section 2.3.4</a> of the Rails Guides:</p> <blockquote> <p>It is possible to send email to one or more recipients in one email (for e.g. informing all admins of a new signup) by setting the list of emails to the :to key. The list of emails can be <strong>an array of email addresses or a single string</strong> with the addresses separated by commas.</p> </blockquote> <p>Looking back at your attempt, FYI - this should work</p> <pre><code>def feedback_mail @verteiler = ["foo@bar.com", "bar@foo.com"] mail(:to => @verteiler, :subject => "Foo Bar") end </code></pre>

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