主题: 报错Helo command rejected: Host not found
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- iRedMail 版本：0.9.8
- 使用的 Linux/BSD 发行版名称及版本号：Ubuntu 18.04.1 LTS
- 与您的问题相关的日志信息：
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求助，邮件服务器是从旧版刚升级到最新版，以前客户的邮件是可以正常发送过来的，升级后一直出现报错，邮件服务器一直拒收，导至无法接收客户邮件，部分日志如下：
Aug 22 21:27:15 mail postfix/smtpd[17093]: connect from unknown[218.24.167.29]
Aug 22 21:27:15 mail postfix/smtpd[17093]: Anonymous TLS connection established from unknown[218.24.167.29]: TLSv1 with cipher AES128-SHA (128/128 bits)
Aug 22 21:27:15 mail postfix/smtpd[17093]: NOQUEUE: reject: RCPT from unknown[218.24.167.29]: 450 4.7.1 <DLIDCHBSVR5.aeonlife.com.cn>: Helo command rejected: Host not found; from=<lichengjian@aeonlife.com.cn> to=<Shuanglu01@i-confluence.com> proto=ESMTP helo=<DLIDCHBSVR5.aeonlife.com.cn>
Aug 22 21:27:15 mail postfix/smtpd[17093]: NOQUEUE: reject: RCPT from unknown[218.24.167.29]: 450 4.7.1 <DLIDCHBSVR5.aeonlife.com.cn>: Helo command rejected: Host not found; from=<lichengjian@aeonlife.com.cn> to=<scottjiao@i-confluence.com> proto=ESMTP helo=<DLIDCHBSVR5.aeonlife.com.cn>
Aug 22 21:27:16 mail postfix/smtpd[17093]: disconnect from unknown[218.24.167.29] ehlo=2 starttls=1 mail=1 rcpt=0/2 quit=1 commands=5/7
Aug 22 21:27:16 mail postfix/postscreen[15775]: CONNECT from [181.214.206.123]:65062 to [192.168.202.40]:25
Aug 22 21:27:16 mail postfix/dnsblog[15777]: addr 181.214.206.123 listed by domain zen.spamhaus.org as 127.0.0.4
Aug 22 21:27:16 mail postfix/postscreen[15775]: DNSBL rank 3 for [181.214.206.123]:65062
Aug 22 21:27:16 mail postfix/postscreen[15775]: DISCONNECT [181.214.206.123]:65062
在官网上找到一个方法如下：
Helo command rejected: Host not found
Sample error message in Postfix log file:
Aug 13 08:07:14 mail postfix/smtpd[8606]: NOQUEUE: reject: RCPT from mta02.globetel.com.ph[120.28.49.114]: 450 4.7.1 : Helo command rejected: Host not found; from=tcadd01@globetel.com.ph to=user@example.com proto=ESMTP helo=
Postfix does DNS query to verify whether A type of DNS record of HELO domain name mta02.globetel.com exists, if not, Postfix rejects the email.
As a temporary solution, you can whitelist this HELO hostname by adding a line like below at the top of file /etc/postfix/helo_access.pcre (Linux/OpenBSD) or /usr/local/etc/postfix/helo_access.pcre (FreeBSD):
/^mta02\.globetel\.com$/ OK
按照上面的提示，把客户地址加进去了，然后确实从日志上没看到报错了，但是问题来了，邮件没有收到，服务器又没有报错日志，这是什么原因呢？客户之前发的邮件去哪了呢？求大神帮帮忙，小弟先谢过了。