邮件后修复日志(传递旧的，新的，DNSBL等级，白名单查找)

Question

我得到了这些后缀信息的组合，我想知道我是否应该知道一些事情/某人。

30.4.2018, 10:08:33 info    statistics: max cache size 1 at Apr 30 10:05:13
30.4.2018, 10:08:33 info    statistics: max connection count 1 for (smtpd:87.243.7.183) at Apr 30 10:05:13
30.4.2018, 10:08:33 info    statistics: max connection rate 1/60s for (smtpd:87.243.7.183) at Apr 30 10:05:13
30.4.2018, 10:05:13 info    disconnect from unknown[87.243.7.183] helo=1 auth=0/1 quit=1 commands=2/3
30.4.2018, 10:05:13 info    connect from unknown[87.243.7.183]
30.4.2018, 10:05:13 warning warning: hostname 183.7.243.87.static.primetelecom.ro does not resolve to address 87.243.7.183: Name or service not known
30.4.2018, 10:05:12 info    PASS OLD [87.243.7.183]:64492
30.4.2018, 10:05:09 info    addr 87.243.7.183 listed by domain zen.spamhaus.org as 127.0.0.4
30.4.2018, 10:05:09 info    Look up 87.243.7.183 on whitelist, result 200 DUNNO
30.4.2018, 10:05:09 info    CONNECT from [87.243.7.183]:64492 to [172.22.1.6]:25
30.4.2018, 09:56:57 info    DISCONNECT [182.176.115.31]:54308
30.4.2018, 09:56:57 info    DNSBL rank 14 for [182.176.115.31]:54308
30.4.2018, 09:56:55 info    addr 182.176.115.31 listed by domain zen.spamhaus.org as 127.0.0.4
30.4.2018, 09:56:55 info    addr 182.176.115.31 listed by domain zen.spamhaus.org as 127.0.0.11
30.4.2018, 09:56:54 info    Look up 182.176.115.31 on whitelist, result 200 DUNNO
30.4.2018, 09:56:54 info    CONNECT from [182.176.115.31]:54308 to [172.22.1.6]:25
30.4.2018, 09:51:40 info    statistics: max cache size 1 at Apr 30 09:48:20
30.4.2018, 09:51:40 info    statistics: max connection count 1 for (smtpd:87.243.7.183) at Apr 30 09:48:20
30.4.2018, 09:51:40 info    statistics: max connection rate 1/60s for (smtpd:87.243.7.183) at Apr 30 09:48:20
30.4.2018, 09:50:00 info    DISCONNECT [185.234.216.221]:59101
30.4.2018, 09:50:00 info    DNSBL rank 9 for [185.234.216.221]:59101
30.4.2018, 09:50:00 info    addr 185.234.216.221 listed by domain b.barracudacentral.org as 127.0.0.2
30.4.2018, 09:49:57 info    addr 185.234.216.221 listed by domain zen.spamhaus.org as 127.0.0.4
30.4.2018, 09:49:57 info    addr 185.234.216.221 listed by domain zen.spamhaus.org as 127.0.0.2
30.4.2018, 09:49:57 info    PREGREET 11 after 0.03 from [185.234.216.221]:59101: EHLO User\r\n
30.4.2018, 09:49:56 info    Look up 185.234.216.221 on whitelist, result 200 DUNNO
30.4.2018, 09:49:56 info    CONNECT from [185.234.216.221]:59101 to [172.22.1.6]:25
30.4.2018, 09:48:20 info    disconnect from unknown[87.243.7.183] helo=1 auth=0/1 quit=1 commands=2/3
30.4.2018, 09:48:20 info    connect from unknown[87.243.7.183]
30.4.2018, 09:48:20 warning warning: hostname 183.7.243.87.static.primetelecom.ro does not resolve to address 87.243.7.183: Name or service not known

有些部分，如Look up 182.176.115.31 on whitelist, result 200 DUNNO或PASS OLD [87.243.7.183]:64492，我并不真正理解。什么是旧的还是新的？我在谷歌上搜索并阅读了一些关于垃圾邮件预防的内容，但对我来说，这看起来像垃圾邮件，那么为什么postfix会阻止IP的出现呢？

Answer 1

看看后缀的“后缀”功能：

http://www.postfix.org/POSTSCREEN_README.html

RBL-检查不同的RBL服务，以检查发送邮件服务器是否称为垃圾邮件服务器。

DNSBL rank日志条目显示所有测试的排序值。如果这超出了主要由postscreen_dnsbl_threshold配置的3，服务器将拒绝邮件，并要求发件人稍后再试。大多数垃圾邮件发送者不会这么做，因为他们只会尽可能地把垃圾邮件推出去，而不会试图重新发送。

后屏将记住一个连接尝试从特定的发送服务器和接收邮件地址.

如果未到达postscreen_dnsbl_threshold，稍后的尝试将允许邮件通过(使用PASS NEW登录)。

如果服务器在几分钟后重新发送邮件，后置屏幕将允许它(用PASS OLD登录)，