zammad/config/routes/email_address.rb

Zammad::Application.routes.draw do
  api_path = Rails.configuration.api_path

  # groups
  match api_path + '/email_addresses',                :to => 'email_addresses#index',  :via => :get
  match api_path + '/email_addresses/:id',            :to => 'email_addresses#show',   :via => :get
  match api_path + '/email_addresses',                :to => 'email_addresses#create', :via => :post
  match api_path + '/email_addresses/:id',            :to => 'email_addresses#update', :via => :put

end