Considered UNSOLICITED BULK EMAIL, apparently from you 退信问题

davishero

邮件发往163邮局，没有问题，但使用163邮箱发给本机用户就退信了，以下为日志，不知是何原因，请大虾指点：
Oct 15 16:29:08 mail postfix/smtpd[2866]: warning: dict_nis_init: NIS domain name not set - NIS lookups disabled
Oct 15 16:29:19 mail postfix/smtpd[2866]: connect from m13-61.163.com[220.181.13.61]
Oct 15 16:29:25 mail postfix/smtpd[2866]: E830C30224: client=m13-61.163.com[220.181.13.61]
Oct 15 16:29:26 mail postfix/cleanup[2874]: E830C30224: message-id=<6396593.338021192437056184.JavaMail.coremail@bj163app61.163.com>
Oct 15 16:29:26 mail postfix/smtpd[2866]: disconnect from m13-61.163.com[220.181.13.61]
Oct 15 16:29:26 mail postfix/qmgr[2176]: E830C30224: from=<davispeng@163.com>, size=1980, nrcpt=1 (queue active)
Oct 15 16:29:47 mail postfix/smtpd[2882]: warning: dict_nis_init: NIS domain name not set - NIS lookups disabled
Oct 15 16:29:47 mail postfix/smtpd[2882]: connect from localhost.localdomain[127.0.0.1]
Oct 15 16:29:47 mail postfix/smtpd[2882]: 75815302C3: client=localhost.localdomain[127.0.0.1]
Oct 15 16:29:47 mail postfix/cleanup[2874]: 75815302C3: message-id=<SSh0ezQEVf1b5R@mail.dhcbi.com>
Oct 15 16:29:47 mail postfix/qmgr[2176]: 75815302C3: from=<>, size=3705, nrcpt=1 (queue active)
Oct 15 16:29:47 mail postfix/smtpd[2882]: disconnect from localhost.localdomain[127.0.0.1]
Oct 15 16:29:47 mail amavis[2685]: (02685-01) Blocked SPAM, [220.181.13.61] [121.34.130.253] <davispeng@163.com> -> <test@dhcchina.kmip.net>, quarantine: spam-h0ezQEVf1b5R.gz, Message-ID: <6396593.338021192437056184.JavaMail.coremail@bj163app61.163.com>, mail_id: h0ezQEVf1b5R, Hits: 7.932, size: 1980, 20370 ms
Oct 15 16:29:47 mail postfix/smtp[2876]: E830C30224: to=<test@dhcchina.kmip.net>, relay=127.0.0.1[127.0.0.1]:10024, delay=27, delays=5.6/0.12/1.8/19, dsn=2.5.0, status=sent (250 2.5.0 Ok, id=02685-01, BOUNCE)
Oct 15 16:29:47 mail postfix/qmgr[2176]: E830C30224: removed