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Rails plugin for sending asynchronous email with ActionMailer and Resque
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A gem plugin which allows messages prepared by ActionMailer to be delivered asynchronously. Assumes that you're using Resque ( for your background jobs.


Include Resque::Mailer in your ActionMailer subclass(es) like this:

class MyMailer < ActionMailer::Base
  include Resque::Mailer

Now, when MyMailer.deliver_subject_email is called, an entry will be created in the job queue. Your Resque workers will be able to deliver this for you; the queue we're using is imaginatively named mailer. Just make sure your workers know about it and are loading your environment:

QUEUE=mailer rake environment resque:work

Note that you can still have mail delivered synchronously by using the bang method variant:


Oh, by the way. Don't forget that your async mailer jobs will be processed by a separate worker. This means that you should resist the temptation to pass database-backed objects as parameters in your mailer and instead pass record identifiers. Then, in your delivery method, you can look up the record from the id and use it as needed.


Install it as a plugin or as a gem plugin from Gemcutter:

gem install resque_mailer
script/plugin install git://

# config/environment.rb
config.gem 'resque_mailer'


You don't want to be sending actual emails in the test environment, so you can configure the environments that should be excluded like so:

# config/initializers/resque_mailer.rb
Resque::Mailer.excluded_environments = [:test, :cucumber]

Note on Patches / Pull Requests

  • Fork the project.

  • Make your feature addition or bug fix.

  • Add tests for it. This is important so I don't break it in a future version unintentionally.

  • Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)

  • Send me a pull request. Bonus points for topic branches.


This work is essentially a forked version of delayed_job_mailer ( by Anderson Dias (which in turn was inspired by Alexander Lang's workling_mailer). Enhanced and modified to work with Resque by Nick Plante.

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