どうやらconfの中の、mail.phpを編集するようだ。

'host' => env('MAIL_HOST', 'smtp.mailgun.org'),
'from' => [
'address' => env('MAIL_FROM_ADDRESS', 'hello@example.com'),
'name' => env('MAIL_FROM_NAME', 'Example'),
],
'username' => env('MAIL_USERNAME'),
'password' => env('MAIL_PASSWORD'),
routs/web.php
Route::get('/', function(){
$data = [];
Mail::send('emails.welcome', $data, function($message){
$message->to('hogehoge@gmail.com')->subject('title')
});
});
ふーん、こんな感じか。。