'driver' => env('MAIL_DRIVER', 'smtp'),
'host' => env('MAIL_HOST', 'smtp.gmail.com'),
'port' => env('MAIL_PORT', 465),
'from' => ['address' => 'email@gmail.com', 'name' => 'name'],
'encryption' => 'ssl',
'username' => env('MAIL_USERNAME'),
'password' => env('MAIL_PASSWORD'),
'sendmail' => '/usr/sbin/sendmail -bs',
'pretend' => false,

MAIL_DRIVER=smtp
MAIL_HOST=smtp.gmail.com
MAIL_PORT=465
MAIL_USERNAME=email@gmail.com
MAIL_PASSWORD=*******
MAIL_ENCRYPTION=ssl

Mail::send('emails.contact',$plan,function($msj) use ($plan)
{
    $msj->to($plan[0]['correoParaPlanTrabajoAlerta']);
    $msj->subject($plan[0]['correoAsuntoPlanTrabajoAlerta']);
    $msj->attach(public_path().'/plantrabajo.html');
});

Expected response code 220 but got code "", with message ""