David, if you really wanted USE_PHPMAILER to be a const not a variable

then have

if (defined(USE_PHPMAILER)) {
    $USE_PHPMAILER=USE_PHPMAILER;
} else {
    $USE_PHPMAILER=false;
}
http://de3.php.net/manual/en/language.constants.php

says no dollars sign should be prepended if you are using a constant not a
variable.

svn path=/trunk/boinc/; revision=8398

html/inc/email.inc

@@ -3,7 +3,7 @@
 require_once("../inc/util.inc");
 require_once("../project/project.inc");
 
-if (defined($USE_PHPMAILER)) {
+if (isset($USE_PHPMAILER)) {
     if ($USE_PHPMAILER) {
         require_once("../inc/phpmailer/class.phpmailer.php");
     }