python如何处理incoming mail

Question

我做一个应用发邮件到某人邮箱，此人回复此邮件后，我收到类似格式的邮件正文：

something...
On Mon, Aug 29, 2011 at 11:38 PM, nobody<nobody@gmail.com> wrote:

> something...
>
>
> On Mon, Aug 29, 2011 at 11:37 PM, <nobody@some-service.com> wrote:
>
>> 
>>
>> something thing
>>
>
>

如何比较好的分离出正文而不要引用原邮件的内容？每个邮箱的格式好像都不太一样？不知有何方法？