to=<pengyt141@hotmail.com>, relay=mx4.hotmail.com[65.54.244.104]:25, delay=53, delays=9.5/0.01/1.6/41, dsn=5.0.0, status=bounced (host mx4.hotmail.com[65.54.244.104] said: 550 DY-001 Mail rejected by Windows Live Hotmail for policy reasons. We generally do not accept email from dynamic IP's as they are not typically used to deliver unauthenticated SMTP e-mail to an Internet mail server. http://www.spamhaus.org maintains lists of dynamic and residential IP addresses. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, please visit http://postmaster.live.com for email delivery information and support (in reply to end of DATA command))
这个是yahoo的信息
to=<shikuang168@yahoo.cn>, relay=mta-v1.mail.vip.cnh.yahoo.com[203.209.250.248]:25, delay=9.9, delays=9.4/0.09/0.45/0, dsn=4.0.0, status=deferred (host mta-v1.mail.vip.cnh.yahoo.com[203.209.250.248] refused to talk to me: 421 Message from (221.136.72.220) temporarily deferred - 4.16.50. Please refer to http://help.yahoo.com/help/us/mail/defer/defer-06.html)