diff --git a/externals/mimemailparser/MimeMailParser.class.php b/externals/mimemailparser/MimeMailParser.class.php
--- a/externals/mimemailparser/MimeMailParser.class.php
+++ b/externals/mimemailparser/MimeMailParser.class.php
@@ -2,6 +2,7 @@
 
 require_once('attachment.class.php');
 
+#[\AllowDynamicProperties]
 /**
  * Fast Mime Mail parser Class using PHP's MailParse Extension
  * @author gabe@fijiwebdesign.com
@@ -31,6 +32,11 @@
 	 */
 	public $attachment_streams;
 
+	/**
+	 * Parts of an email
+	 */
+	private $parts = [];
+
 	/**
 	 * Inialize some stuff
 	 * @return
@@ -134,7 +140,6 @@
 	 */
 	private function parse() {
 		$structure = mailparse_msg_get_structure($this->resource);
-		$this->parts = array();
 		foreach($structure as $part_id) {
 			$part = mailparse_msg_get_part($this->resource, $part_id);
 			$this->parts[$part_id] = mailparse_msg_get_part_data($part);