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letmein/application_mailer.rb

Created May 5, 2017 18:11
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spec/support/application_mailer.rb
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application_mailer.rb
# frozen_string_literal: true
module MailerNameHeader
extend ActiveSupport::Concern
included do
after_action :set_headers
end
private
def set_headers
headers['X-Mailer-Name'] = self.class.name
end
end
ApplicationMailer.include(MailerNameHeader)
# Ex: mail.header['X-Mailer-Name'].value
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