diff --git a/config/environments/development.rb b/config/environments/development.rb
index 68c0aeaa..c940de0e 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -88,7 +88,7 @@ Rails.application.configure do
 
   hosts = ENV.fetch('APPLICATION_HOSTS', 'localhost').split(',')
 
-  config.action_mailer.default_url_options = { host: ENV['SMTP_DOMAIN'] || hosts.first, port: ENV.fetch('PORT', 3000) }
+  config.action_mailer.default_url_options = { host: ENV['DOMAIN'] || hosts.first, port: ENV.fetch('PORT', 3000) }
 
   config.hosts.concat(hosts) if hosts.present?
 
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 7207e549..1e4b392a 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -103,7 +103,7 @@ Rails.application.configure do
   config.host_authorization = { exclude: ->(request) { request.path == "/api/v1/health" } }
   hosts = ENV.fetch('APPLICATION_HOSTS', 'localhost').split(',')
 
-  config.action_mailer.default_url_options = { host: ENV['SMTP_DOMAIN'] }
+  config.action_mailer.default_url_options = { host: ENV['DOMAIN'] }
   config.hosts.concat(hosts) if hosts.present?
 
   config.action_mailer.delivery_method = :smtp