kenh@domainname.com.au on Tue, 21 Apr 2009 17:55:04 +0800
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< relay03.westnet.com.au #5.0.0 X-Postfix; host
mail.dvjs.com.au[IP Address] said: 550 5.1.1 User unknown (in
reply to RCPT TO command)>作者: 钉子 时间: 2009-4-22 00:01
被中继有几种情况:
1.确实开放了中继。
2.某用户密码被猜出来,进行中继。