You probably need to change your configurations.
config/app.php change the name value to whatever you like
and in the config/mail.php you can edit the from values.
If you want the from to be different than the default from, you can call the from method in your MailMessage chain.
public function toMail($notifiable)
{
return (new MailMessage)
->subject('You have new follower')
->from('cthulhu@microsoft.com', 'Moses Toh')
->greeting('Hello!')
->line('Welcome to my application')
->line('Thank you');
}
Further if you want to actually modify the layout/html/css of the email check the section Customizing The Templates here https://laravel.com/docs/5.3/notifications#mail-notifications
You can modify the HTML and plain-text template used by mail notifications by publishing the notification package's resources. After running this command, the mail notification templates will be located in the resources/views/vendor/notifications directory:
php artisan vendor:publish --tag=laravel-notifications