Ticket #10420: 10420_2.patch

pluggable.php

@@ -374 +374 @@
         $phpmailer->FromName = apply_filters( 'wp_mail_from_name', $from_name );
 
         // Set destination address
-        $phpmailer->AddAddress( $to );
+        foreach ( (array) $to as $recipient ) {
+                $phpmailer->AddAddress( trim($recipient) );
+        }
 
         // Set mail's subject and body
         $phpmailer->Subject = $subject;