Update .env

.env

@@ -27,9 +27,6 @@ APP_SECRET=YOUR_APP_SECRET
 DATABASE_URL=mysql://db_user:[email protected]:3306/db_name
 ###< doctrine/doctrine-bundle ###
 
-###> symfony/swiftmailer-bundle ###
-# For Gmail as a transport, use: "gmail://username:password@localhost"
-# For a generic SMTP server, use: "smtp://localhost:25?encryption=&auth_mode="
-# Delivery is disabled by default via "null://localhost"
-MAILER_URL=null://localhost
-###< symfony/swiftmailer-bundle ###
+###> symfony/mailer ###
+MAILER_DSN=null://null
+###< symfony/mailer ###