--- date: 20201112 id: 340acfc8-c621-4578-a588-c306ebaa4d75 title: Deprecating Service Aliases --- # Description It's possible to deprecate [service](20201112124304-symfony_services) aliases # Syntax ``` yaml # config/services.yaml services: # ... app.mailer: alias: App\Mail\PhpMailer deprecated: ~ ``` ## Custom error message ``` yaml # config/services.yaml services: # ... app.mailer: alias: App\Mail\PhpMailer deprecated: 'The "%alias_id%" service alias is deprecated.' ```