MAIL_DRIVER=smtp
MAIL_HOST=mail.mydomain.ir
MAIL_PORT=587
MAIL_USERNAME=account@mydomain.ir
MAIL_PASSWORD= ....
MAIL_ENCRYPTION=null

'from' => ['address' =>env('MAIL_USERNAME', 'account@mydomain.ir'), 'name' => 'ESET'],

public function getEm()
{
    $input = [] ;
    Mail::send('emails.simple', $input, function($message) {
            $message->to('some@gmail.com', 'Learning')->subject('Contact view Our Contact Form');
    });
    return 'Your message has been sent';
}

MAIL_DRIVER=smtp
MAIL_HOST=localhost
MAIL_PORT=587
MAIL_USERNAME=account@mydomain.ir
MAIL_PASSWORD=....
MAIL_ENCRYPTION=null