Ahora si(?

app/Mail/WelcomeMail.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Mail;
+
+use Illuminate\Bus\Queueable;
+use Illuminate\Mail\Mailable;
+use Illuminate\Queue\SerializesModels;
+
+class WelcomeMail extends Mailable
+{
+    use Queueable, SerializesModels;
+
+    public $user;
+    public $tipo;
+
+    public function __construct($user, $tipo)
+    {
+        $this->user = $user;
+        $this->tipo = $tipo;
+    }
+
+    public function build()
+    {
+        return $this->subject('¡Bienvenido a OnAPB!')
+                    ->view('emails.welcome');
+    }
+}