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Forward mail from gmail IMAP to a callback URL, simply.
branch: master


mail_room is a configuration based process that will idle on IMAP connections and POST to a delivery URL whenever a new message is received on the configured mailbox and folder.

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Add this line to your application's Gemfile:

gem 'mail_room'

And then execute:

$ bundle

Or install it yourself as:

$ gem install mail_room

You will also need to install faraday or letter_opener if you use the postback or letter_opener delivery methods, respectively.


mail_room -c /path/to/config.yml


    :email: ""
    :password: "password"
    :name: "inbox"
    :delivery_url: "http://localhost:3000/inbox"
    :delivery_token: "abcdefg"
    :search_command: 'NEW'
    :email: ""
    :password: "password"
    :name: "inbox"
    :delivery_method: postback
    :delivery_url: "http://localhost:3000/inbox"
    :delivery_token: "abcdefg"
    :email: ""
    :password: "password"
    :name: "inbox"
    :delivery_method: logger
    :log_path: "/var/log/user3-email.log"
    :email: ""
    :password: "password"
    :name: "inbox"
    :delivery_method: letter_opener
    :location: "/tmp/user4-email"



Requires faraday gem be installed.

NOTE: If you're using Ruby >= 2.0, you'll need to use Faraday from >= 0.8.9. Versions before this seem to have some weird behavior with mail_room.

The default delivery method, requires delivery_url and delivery_token in configuration.

As the postback is essentially using your app as if it were an API endpoint, you may need to disable forgery protection as you would with a JSON API. In our case, the postback is plaintext, but the protection will still need to be disabled.


Configured with :delivery_method: logger.

If :log_path: is not provided, defaults to STDOUT


Configured with :delivery_method: noop.

Does nothing, like it says.


Requires letter_opener gem be installed.

Configured with :delivery_method: letter_opener.

Uses Ryan Bates' excellent letter_opener gem.

Receiving postback in Rails

If you have a controller that you're sending to, with forgery protection disabled, you can get the raw string of the email using

I would recommend having the mail gem bundled and parse the email using Mail.read_from_string(

Search Command

This setting allows configuration of the IMAP search command sent to the server. This still defaults 'UNSEEN'. You may find that 'NEW' works better for you.

IMAP Server Configuration

You can set per-mailbox configuration for the IMAP server's host (default: ''), port (default: 993), and ssl (default: true).

Running in Production

I suggest running with either upstart or init.d. Check out this wiki page for some example scripts for both:


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request
  6. If accepted, ask for commit rights


  1. specs, this is just a (working) proof of concept √
  2. finish code for POSTing to callback with auth √
  3. accept mailbox configuration for one account directly on the commandline; or ask for it
  4. add example rails endpoint, with auth examples
  5. add example configs for upstart/init.d √
  6. log to stdout √
  7. add a development mode that opens in letter_opener by ryanb √
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