What settings does laravel5 use in .env or config/?

Question

Laravel

There are settings for example mail in config/mail.php and in .env
Why in 2 places and which ones are used when?

Answer 1

mail.php pulls the settings from the .env file, if they are there. .env stores only those settings that depend on the environment (on the local server there may be one port for mail, on production another), and all the rest (such as the name of your application) are stored in config files.