oops: Fix file key matchup in emails

include/class.file.php

@@ -94,7 +94,7 @@ class AttachmentFile {
     }
 
     function getKey() {
-        return strtolower($this->ht['key']);
+        return $this->ht['key'];
     }
 
     function getSignature() {

include/class.mailer.php

@@ -175,7 +175,7 @@ class Mailer {
                         return $match[0];
                     $mime->addHTMLImage($file->getData(),
                         $file->getType(), $file->getName(), false,
-                        $file->getKey().'@'.$domain);
+                        $match[1].'@'.$domain);
                     // Don't re-attach the image below
                     unset($self->attachments[$file->getId()]);
                     return $match[0].'@'.$domain;