app:update

config/environments/development.rb

@@ -40,6 +40,8 @@ Rails.application.configure do
   # Don't care if the mailer can't send.
   config.action_mailer.raise_delivery_errors = false
 
+  # Disable caching for Action Mailer templates even if Action Controller
+  # caching is enabled.
   config.action_mailer.perform_caching = false
 
   config.action_mailer.default_url_options = { host: "localhost", port: 3000 }

config/environments/production.rb

@@ -50,6 +50,7 @@ Rails.application.configure do
 
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   config.force_ssl = true
+
   # Skip http-to-https redirect for the default health check endpoint.
   # config.ssl_options = { redirect: { exclude: ->(request) { request.path == "/up" } } }
 
@@ -73,6 +74,8 @@ Rails.application.configure do
   # config.active_job.queue_adapter = :resque
   # config.active_job.queue_name_prefix = "railsondocker_production"
 
+  # Disable caching for Action Mailer templates even if Action Controller
+  # caching is enabled.
   config.action_mailer.perform_caching = false
 
   # Ignore bad email addresses and do not raise email delivery errors.

config/environments/test.rb

@@ -34,6 +34,8 @@ Rails.application.configure do
   # Store uploaded files on the local file system in a temporary directory.
   config.active_storage.service = :test
 
+  # Disable caching for Action Mailer templates even if Action Controller
+  # caching is enabled.
   config.action_mailer.perform_caching = false
 
   # Tell Action Mailer not to deliver emails to the real world.