module ActionMailer
module ActionMailer::Callbacks
module ActionMailer::Callbacks::ClassMethods
module ActionMailer::DeliveryMethods
module ActionMailer::DeliveryMethods::ClassMethods
module ActionMailer::FormBuilder
module ActionMailer::FormBuilder::ClassMethods
module ActionMailer::MailHelper
module ActionMailer::Parameterized
module ActionMailer::Parameterized::ClassMethods
module ActionMailer::Previews
module ActionMailer::Previews::ClassMethods
module ActionMailer::QueuedDelivery
module ActionMailer::Rescuable
module ActionMailer::TestCase::Behavior
module ActionMailer::TestCase::Behavior::ClassMethods
module ActionMailer::TestCase::ClearTestDeliveries
module ActionMailer::TestHelper
module ActionMailer::VERSION
module Rails
module Rails::Generators
class ActionMailer::Base
class ActionMailer::Base::LateAttachmentsProxy
class ActionMailer::Base::NullMail
class ActionMailer::Collector
class ActionMailer::InlinePreviewInterceptor
class ActionMailer::LogSubscriber
class ActionMailer::MailDeliveryJob
class ActionMailer::MessageDelivery
class ActionMailer::NonInferrableMailerError
class ActionMailer::Parameterized::Mailer
class ActionMailer::Parameterized::MessageDelivery
class ActionMailer::Preview
class ActionMailer::Railtie
class ActionMailer::TestCase
class Rails::Generators::MailerGenerator
actionmailer
8.0.1
# header
def header; {} end