title: wordpress contact form 7 is not sending email with attachment of file more than 7mb
body: <p>I have used a contact form 7 form with an attachment field in one of my wordpress websites. The form is working properly (sending mail) when the attached file size (image) is less than 7mb. But If I attach a image file of more than 7mb, the mail is not being sent. Even any error message is not showing, just the processing cycle icon is rotating. just the processing icon is rotating. But, I have set the limit to 15mb. </p>
  
  <p>Here is my attachment field:</p>
  
  <pre><code>&lt;p&gt;Attachment (required)&lt;br /&gt;
  [file file-866 limit:15mb] &lt;/p&gt;
  </code></pre>
  
  <p>Please help me to get rid of this problem.</p>