Mailfire
(yes, its a bad name)
For when you don't want to send emails for real, but still want an easy way to sanity check the content (i.e. on dev)
ActionMailer::Base.add_delivery_method :campfire,
Mailfire::TextToRoom,
account: 'youraccount',
token: '9s8d7fasfdasdfasdfsdfnskldf......',
room: 'mail'
if Rails.env.development?
ActionMailer::Base.delivery_method = :campfire
end
And your email to, from, subject and body will be 'delivered' to your campfire room