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- iRedMail 版本号：0.9.6
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）：OpenLDAP
- 使用的 Linux/BSD 发行版名称及版本号：centos 7
- 与您的问题相关的日志信息：

mail postfix/postscreen[7771]: CONNECT from [175.45.36.69]:35255 to [192.168.186.200]:25
Sep 14 10:58:23 mail postfix/postscreen[7771]: PASS OLD [175.45.36.69]:35255
Sep 14 10:58:23 mail postfix/smtpd[31088]: warning: hostname mail1.cds.com.hk does not resolve to address 175.45.36.69
Sep 14 10:58:23 mail postfix/smtpd[31088]: connect from unknown[175.45.36.69]
Sep 14 10:58:23 mail postfix/smtpd[31088]: Anonymous TLS connection established from unknown[175.45.36.69]: TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)
Sep 14 10:58:23 mail postfix/smtpd[31088]: NOQUEUE: reject: RCPT from unknown[175.45.36.69]: 450 4.7.1 <CDSSRVDCEX02.hkdc.cds-net.com>: Helo command rejected: Host not found; from=<support@cds.com.hk> to=<Atina@mydomain.com> proto=ESMTP helo=<CDSSRVDCEX02.hkdc.cds-net.com>
Sep 14 10:58:24 mail postfix/smtpd[31088]: NOQUEUE: reject: RCPT from unknown[175.45.36.69]: 450 4.7.1 <CDSSRVDCEX02.hkdc.cds-net.com>: Helo command rejected: Host not found; from=<support@cds.com.hk> to=<sunnydai@mydomain.com> proto=ESMTP helo=<CDSSRVDCEX02.hkdc.cds-net.com>
Sep 14 10:58:24 mail postfix/smtpd[31088]: NOQUEUE: reject: RCPT from unknown[175.45.36.69]: 450 4.7.1 <CDSSRVDCEX02.hkdc.cds-net.com>: Helo command rejected: Host not found; from=<support@cds.com.hk> to=<Miranda@mydomain.com> proto=ESMTP helo=<CDSSRVDCEX02.hkdc.cds-net.com>
Sep 14 10:58:25 mail postfix/smtpd[31088]: NOQUEUE: reject: RCPT from unknown[175.45.36.69]: 450 4.7.1 <CDSSRVDCEX02.hkdc.cds-net.com>: Helo command rejected: Host not found; from=<support@cds.com.hk> to=<wurui@mydomain.com> proto=ESMTP helo=<CDSSRVDCEX02.hkdc.cds-net.com>
Sep 14 10:58:25 mail postfix/smtpd[31088]: disconnect from unknown[175.45.36.69]

====

客户发件是通过中继发过来的，因为主机名存在问题，被“reject_unknown_helo_hostname” 这个功能过滤掉！

请问张工能否针对这类的问题，开设白名单类似的功能来让这些客户与我们的系统正常通信，而不需要关闭反垃圾的功能。