邮件正文解码的问题，高手帮帮忙

通过pop3取得邮件代码后，标题我已经解出来了，就是不知道正文怎么解，通过outlook取出来的正文如下：text/html; charset=utf-8rncontent-transfer-encoding: base64rnX-CM-TRANSID:EcCowGC5v1awyeBOzibHAA--.3263S2rnX-Coremail-Antispam: 1Uf129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7v73VFW2AGmfu7bjvjm3AaLaJ3UbIYCTnIWIevJa73UjIFyTuYvjxUwLvtDUUUUMessage-Id: <[email protected]>rnX-CM-SenderInfo: p1dqwmquwxjmqt6rljoofrz/xtbBDQUQcUZf92W6IgABs7rnrn5ZWK5
ZWK5ZWK5ZWK5ZWK5ZWK5ZWK5piv5aSn5am25Yiw5bqV5pivMjMyM3Z2dnZ2dndldw==rn应该从哪开始解码正文，怎么解，我把这些用outlook打开也是解不开啊，求解码方法。我用的是net2005