Action Mailer

FalseClass

:raise_delivery_errors

String

:assets_dir
:javascripts_dir
:stylesheets_dir
:preview_path

TrueClass

:show_previews

NilClass

:asset_host
:relative_url_root

其它：

config.action_mailer.logger

config.action_mailer.smtp_settings

config.action_mailer.sendmail_settings

config.action_mailer.delivery_method

config.action_mailer.perform_deliveries

config.action_mailer.default_options

config.action_mailer.observers

config.action_mailer.interceptors