update,

quotation2/laravel-simple-tryout/php74-httpd/example-app/app/Mail/Sendmail.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Mail;
+
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+use Illuminate\Queue\SerializesModels;
+
+class Sendmail extends Mailable {
+
+    use Queueable,
+        SerializesModels;
+
+    /**
+     * Create a new message instance.
+     *
+     * @return void
+     */
+    public function __construct() {
+        //
+    }
+
+    /**
+     * Get the message envelope.
+     *
+     * @return \Illuminate\Mail\Mailables\Envelope
+     */
+    public function envelope() {
+        return new Envelope(
+                subject: 'Sendmail',
+        );
+    }
+
+    /**
+     * Get the message content definition.
+     *
+     * @return \Illuminate\Mail\Mailables\Content
+     */
+    public function content() {
+        return new Content(
+                view: 'view.name',
+        );
+    }
+
+    /**
+     * Get the attachments for the message.
+     *
+     * @return array
+     */
+    public function attachments() {
+        return [];
+    }
+
+}