Sample spam with subject Returned Msg: =?UTF-8?B?UmU6IEdhdXplIGZhYnJpYyBzbGl0dGluZyBtYWNoaW5lLGxhdGV4IGdsb3ZlIGlubmVyIHBhY2tpbmcgbWFjaGluZQ==?= (1)

Date	From, Subject	Body
6 years ago	<Antispam@system> Returned Msg: =?UTF-8?B?UmU6IEdhdXplIGZhYnJpYyBzbGl0dGluZyBtYWNoaW5lLGxhdGV4IGdsb3ZlIGlubmVyIHBhY2tpbmcgbWFjaGluZQ==?=	The attached message was undeliverable. while talking to [203.248.195.181:25] 550 sorry, your recipi