title: Did I solve my "Target class [mail.manager] does not exist." issue?
body: <p>Just upgraded from Laravel 6 to 7, and had the error response above when submitting a contact form. I eventually found a solution that seems to work and I am submitting here to help out the next guy.</p>
  <p>In the terminal run:</p>
  <pre><code>composer require illuminate/mail 
  </code></pre>
  <p>Add the following to the top of the controller file (app/Http/Controllers/Main.php in my case):</p>
  <pre><code>use \Illuminate\Support\Facades\Mail;
  </code></pre>
  <p>Add this to bootstrap/app.php:</p>
  <pre><code>$app-&gt;register(Illuminate\Mail\MailServiceProvider::class); 
  </code></pre>
  <p>Save and test, and it worked localhost.</p>
  <p>If the above does not work for you, there are some other possible issues and solutions available at this link, where I must give credit to vipindasks.</p>
  <p><a href="https://laracasts.com/discuss/channels/lumen/lumen-52-mail-not-working" rel="noreferrer">https://laracasts.com/discuss/channels/lumen/lumen-52-mail-not-working</a></p>
  <p>Since I am suppose to ask a question:</p>
  <p>Do you see any problems with this solution even though the site and mailer is working now?</p>