正则的问题，截取下面文章里的邮箱和Registrant:后的姓名，但是有好多不同情况，请问正则表达式该怎么写？
情况1：
Registrant:
jin mi
jin mi 8
shen zhen, guang dong 518000
China
Registered through: GoDaddy.com, LLC (http://www.godaddy.com)
Domain Name: 760PK.COM
Created on: 04-May-12
Expires on: 04-May-13
Last Updated on: 28-Jun-12
Administrative Contact:
mi, jin linliangemail@qq.com
jin mi 8
shen zhen, guang dong 518000
China
+86.13510187966
Technical Contact:
mi, jin linliangemail@qq.com
jin mi 8
shen zhen, guang dong 518000
China
+86.13510187966
情况2：
Registrant:
Domain Administrator
Netease.com, Inc
No.16, Ke Yun Rd Tianhe District
GuangZhou GuangDong 510665
CN
nsadmin@corp.netease.com +86.2085106370 Fax: +86.2085106370
情况3：
Registrant:
Zhiyong Duan
Beijing Baidu Netcom Science Technology Co., Ltd.
3F Baidu Campus No.10 Shangdi 10th Street Haidian District
Beijing Beijing 100085
CN
domainmaster@baidu.com +86.1059924216 Fax: +86.1059927435
[解决办法]
//姓名preg_match_all('/Registrant:\s*(\w+\s+\w+)/s',$str,$name); print_r($name[1]);//邮箱preg_match_all('/\b[\w_]+@[\w\._]+/m',$str,$email); print_r($email);