A multi-part e-mail message can exists out of different parts.Like:Array( [0] => 1 [1] => 1.1 [2] => 1.1.1 [3] => 1.1.2 [4] => 1.2)Each part is a section in the mail message. To loop through every part of the message you need to go like this:$mime_part = mailparse_msg_get_part($this->message, "1.2"); //1.2 is the binary base64 encoded part of the attachement $body_parts = mailparse_msg_get_part_data($mime_part); Body part looks like this:Array( [headers] => Array ( [content-type] => application/x-zip-compressed; name="3000_000000.txt" [content-disposition] => attachment; filename="3000_000000.txt" [content-transfer-encoding] => base64 [x-attachment-id] => b31f1a24358e7e5_0.1 ) [starting-pos] => 4513 [starting-pos-body] => 4736 [ending-pos] => 4772 [ending-pos-body] => 4772 [line-count] => 6 [body-line-count] => 0 [charset] => us-ascii [transfer-encoding] => base64 [content-name] => 3000_000000.sbd [content-type] => application/x-zip-compressed [disposition-filename] => 3000_000000.sbd [content-disposition] => attachment [content-base] => /)