diff --git a/app/models/safe_mailer.rb b/app/models/safe_mailer.rb
index 77df67714af..a3f745c6b7c 100644
--- a/app/models/safe_mailer.rb
+++ b/app/models/safe_mailer.rb
@@ -5,7 +5,9 @@ class SafeMailer < ApplicationRecord
     raise if SafeMailer.count == 1
   end
 
-  enum :forced_delivery_method, (Rails.application.config.action_mailer&.balancer_settings&.keys || []).to_h { |k| [k.to_sym, k.to_s] }
+  if Rails.application.config.action_mailer.balancer_settings.present?
+    enum :forced_delivery_method, (Rails.application.config.action_mailer.balancer_settings.keys || []).to_h { |k| [k.to_sym, k.to_s] }
+  end
 
   def self.forced_delivery_method
     first&.forced_delivery_method