diff --git a/config/environments/production.rb b/config/environments/production.rb
index 45b256ef5..d9de907da 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -58,6 +58,8 @@ Rails.application.configure do
 
   config.action_mailer.perform_caching = false
 
+  config.action_mailer.default_url_options = { host: ENV['PRODUCTION_HOST'], port: 3000 }
+
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate delivery to raise delivery errors.
   # config.action_mailer.raise_delivery_errors = false
diff --git a/config/environments/sandbox.rb b/config/environments/sandbox.rb
index 45b256ef5..bfd72fce4 100644
--- a/config/environments/sandbox.rb
+++ b/config/environments/sandbox.rb
@@ -58,6 +58,8 @@ Rails.application.configure do
 
   config.action_mailer.perform_caching = false
 
+  config.action_mailer.default_url_options = { host: ENV['SANDBOX_HOST'], port: 3000 }
+
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate delivery to raise delivery errors.
   # config.action_mailer.raise_delivery_errors = false