diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index 3eef2ded1b..6e6885d636 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -435,6 +435,9 @@ module ActionMailer
# * deliveries - Keeps an array of all the emails sent out through the Action Mailer with
# delivery_method :test. Most useful for unit and functional testing.
#
+ # * delivery_job - The job class used with deliver_later. Defaults to
+ # +ActionMailer::MailDeliveryJob+.
+ #
# * deliver_later_queue_name - The name of the queue used with deliver_later.
class Base < AbstractController::Base
include DeliveryMethods
diff --git a/guides/source/action_mailer_basics.md b/guides/source/action_mailer_basics.md
index 12fe70e981..618718e906 100644
--- a/guides/source/action_mailer_basics.md
+++ b/guides/source/action_mailer_basics.md
@@ -810,6 +810,8 @@ files (environment.rb, production.rb, etc...)
|`delivery_method`|Defines a delivery method. Possible values are:
- `:smtp` (default), can be configured by using `config.action_mailer.smtp_settings`.
- `:sendmail`, can be configured by using `config.action_mailer.sendmail_settings`.
- `:file`: save emails to files; can be configured by using `config.action_mailer.file_settings`.
- `:test`: save emails to `ActionMailer::Base.deliveries` array.
See [API docs](https://api.rubyonrails.org/classes/ActionMailer/Base.html) for more info.|
|`perform_deliveries`|Determines whether deliveries are actually carried out when the `deliver` method is invoked on the Mail message. By default they are, but this can be turned off to help functional testing. If this value is `false`, `deliveries` array will not be populated even if `delivery_method` is `:test`.|
|`deliveries`|Keeps an array of all the emails sent out through the Action Mailer with delivery_method :test. Most useful for unit and functional testing.|
+|`delivery_job`|The job class used with `deliver_later`. Defaults to `ActionMailer::MailDeliveryJob`.|
+|`deliver_later_queue_name`|The name of the queue used with `deliver_later`.|
|`default_options`|Allows you to set default values for the `mail` method options (`:from`, `:reply_to`, etc.).|
For a complete writeup of possible configurations see the