diff --git a/config/initializers/new_framework_defaults_6_0.rb b/config/initializers/new_framework_defaults_6_0.rb
index 10ac4e20d..11ca26536 100644
--- a/config/initializers/new_framework_defaults_6_0.rb
+++ b/config/initializers/new_framework_defaults_6_0.rb
@@ -37,7 +37,7 @@ Rails.application.config.active_storage.replace_on_assign_to_many = true
 # If you send mail in the background, job workers need to have a copy of
 # MailDeliveryJob to ensure all delivery jobs are processed properly.
 # Make sure your entire app is migrated and stable on 6.0 before using this setting.
-# Rails.application.config.action_mailer.delivery_job = "ActionMailer::MailDeliveryJob"
+Rails.application.config.action_mailer.delivery_job = "ActionMailer::MailDeliveryJob"
 
 # Enable the same cache key to be reused when the object being cached of type
 # `ActiveRecord::Relation` changes by moving the volatile information (max updated at and count)