请帮我看看这日志是怎回事？

GZHONEY

Thu 2015-07-09 13:30:59.199: Session 006088; child 0001
Thu 2015-07-09 13:30:59.199: Accepting SMTP connection from 218.107.6.204:24651 to 120.236.158.138:25
Thu 2015-07-09 13:30:59.203: --> 220 mail.hlyex.com ESMTP MDaemon 15.0.3; Thu, 09 Jul 2015 13:30:59 +0800
Thu 2015-07-09 13:30:59.270: <-- EHLO ksgm.gtmc.com.cn
Thu 2015-07-09 13:30:59.271: --> 250-mail.hlyex.com Hello ksgm.gtmc.com.cn, pleased to meet you
Thu 2015-07-09 13:30:59.271: --> 250-ETRN
Thu 2015-07-09 13:30:59.271: --> 250-AUTH LOGIN CRAM-MD5 PLAIN
Thu 2015-07-09 13:30:59.271: --> 250-8BITMIME
Thu 2015-07-09 13:30:59.271: --> 250-ENHANCEDSTATUSCODES
Thu 2015-07-09 13:30:59.271: --> 250 SIZE
Thu 2015-07-09 13:30:59.336: <-- MAIL FROM:<yun@gtmc.com.cn> SIZE=4752851
Thu 2015-07-09 13:30:59.336: Performing PTR lookup (204.6.107.218.IN-ADDR.ARPA)
Thu 2015-07-09 13:31:09.336: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.136.192.6)
Thu 2015-07-09 13:31:19.336: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.139.163.6)
Thu 2015-07-09 13:31:20.149: *  D=204.6.107.218.IN-ADDR.ARPA TTL=(60) PTR=[mail.gtmc.com.cn]
Thu 2015-07-09 13:31:20.149: *  mail.gtmc.com.cn 在内部 AAAA 查询黑名单中找到
Thu 2015-07-09 13:31:30.150: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.136.192.6)
Thu 2015-07-09 13:31:40.150: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.139.163.6)
Thu 2015-07-09 13:31:40.151: *  D=mail.gtmc.com.cn TTL=(10) A=[14.18.159.4]
Thu 2015-07-09 13:31:40.152: ---- End PTR results
Thu 2015-07-09 13:31:40.152: Performing IP lookup (ksgm.gtmc.com.cn)
Thu 2015-07-09 13:31:50.152: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.136.192.6)
Thu 2015-07-09 13:32:00.152: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.139.163.6)
Thu 2015-07-09 13:32:00.156: *  D=ksgm.gtmc.com.cn TTL=(10) A=[14.18.159.68]
Thu 2015-07-09 13:32:00.156: ---- End IP lookup results
Thu 2015-07-09 13:32:00.159: Performing IP lookup (gtmc.com.cn)
Thu 2015-07-09 13:32:10.159: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.136.192.6)
Thu 2015-07-09 13:32:20.159: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.139.163.6)
Thu 2015-07-09 13:32:20.161: *  D=gtmc.com.cn TTL=(30) A=[121.8.181.125]
Thu 2015-07-09 13:32:30.161: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.136.192.6)
Thu 2015-07-09 13:32:40.161: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.139.163.6)
Thu 2015-07-09 13:32:40.163: *  P=010 S=000 D=gtmc.com.cn TTL=(13) MX=[mail.gtmc.com.cn]
Thu 2015-07-09 13:32:40.163: *  P=020 S=001 D=gtmc.com.cn TTL=(13) MX=[mailsrv.gtmc.com.cn]
Thu 2015-07-09 13:32:40.163: *  P=030 S=002 D=gtmc.com.cn TTL=(13) MX=[mail-bk.gtmc.com.cn]
Thu 2015-07-09 13:32:40.163: *  P=030 S=003 D=gtmc.com.cn TTL=(13) MX=[temp.gtmc.com.cn]
Thu 2015-07-09 13:32:40.163: *  P=050 S=004 D=gtmc.com.cn TTL=(13) MX=[ai.gtmc.com.cn]
Thu 2015-07-09 13:32:40.163: *  mail.gtmc.com.cn 在内部 AAAA 查询黑名单中找到
Thu 2015-07-09 13:32:50.163: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.136.192.6)
Thu 2015-07-09 13:33:00.163: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.139.163.6)
Thu 2015-07-09 13:33:00.165: *  D=mail.gtmc.com.cn TTL=(10) A=[14.18.159.4]
Thu 2015-07-09 13:33:10.166: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.136.192.6)
Thu 2015-07-09 13:33:20.166: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.139.163.6)
Thu 2015-07-09 13:33:20.173: *  D=mailsrv.gtmc.com.cn TTL=(60) A=[14.18.159.68]
Thu 2015-07-09 13:33:30.173: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.136.192.6)
Thu 2015-07-09 13:33:40.183: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.139.163.6)
Thu 2015-07-09 13:33:40.191: *  D=mail-bk.gtmc.com.cn TTL=(60) A=[210.21.63.8]
Thu 2015-07-09 13:33:50.191: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.136.192.6)
Thu 2015-07-09 13:34:00.191: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.139.163.6)
Thu 2015-07-09 13:34:00.202: *  D=temp.gtmc.com.cn TTL=(10) A=[14.18.159.68]
Thu 2015-07-09 13:34:10.202: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.136.192.6)
Thu 2015-07-09 13:34:20.202: *  DNS: 10 second wait for DNS response exceeded (DNS Server: 211.139.163.6)
Thu 2015-07-09 13:34:20.208: *  D=ai.gtmc.com.cn TTL=(10) A=[14.18.159.68]
Thu 2015-07-09 13:34:20.208: ---- End IP lookup results
Thu 2015-07-09 13:34:20.217: Performing SPF lookup (gtmc.com.cn / 218.107.6.204)
Thu 2015-07-09 13:34:20.217: *  Policy (cache): v=spf1 ip4:14.18.159.5 ip4:14.18.159.69 ip4:218.107.6.205 ip4:210.21.126.205 ip4:14.18.159.4 ip4:14.18.159.68 ip4:218.107.6.204 ip4:210.21.126.204 ip4:218.107.6.205 ~all
Thu 2015-07-09 13:34:20.218: *  Evaluating ip4:14.18.159.5: no match
Thu 2015-07-09 13:34:20.218: *  Evaluating ip4:14.18.159.69: no match
Thu 2015-07-09 13:34:20.218: *  Evaluating ip4:218.107.6.205: no match
Thu 2015-07-09 13:34:20.218: *  Evaluating ip4:210.21.126.205: no match
Thu 2015-07-09 13:34:20.218: *  Evaluating ip4:14.18.159.4: no match
Thu 2015-07-09 13:34:20.218: *  Evaluating ip4:14.18.159.68: no match
Thu 2015-07-09 13:34:20.218: *  Evaluating ip4:218.107.6.204: match
Thu 2015-07-09 13:34:20.218: *  Result: pass
Thu 2015-07-09 13:34:20.218: ---- End SPF results
Thu 2015-07-09 13:34:20.218: --> 250 2.1.0 Sender OK
Thu 2015-07-09 13:34:20.285: <-- RCPT TO:<liwen@hlyex.com>
Thu 2015-07-09 13:34:20.296: --> 451 4.1.0 Recipient unknown
Thu 2015-07-09 13:34:20.296: liwen@hlyex.com account is currently disabled
Thu 2015-07-09 13:34:20.428: <-- RSET
Thu 2015-07-09 13:34:20.429: --> 250 2.0.0 RSET? Well, OK
Thu 2015-07-09 13:34:20.497: <-- QUIT
Thu 2015-07-09 13:34:20.497: --> 221 2.0.0 See ya in cyberspace
Thu 2015-07-09 13:34:20.498: SMTP session terminated (Bytes in/out: 116/336)


邮件经常收不到，查看日志是这样，请大神帮我看看，这是什么原因。
特别是：在内部 AAAA 查询黑名单中找到  这句话是什么意思？