title: Error with PHP mail() function
body: <p>I'm having an error trying to send mail with PHP using the <code>mail()</code> function. Here's the error message I'm getting:</p>
  
  <pre><code>sendmail_from" not set in php.ini or custom "From:" header missing 
  in C:\xampp\htdocs\strawman\addstudent.php on line 265..
  </code></pre>