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Postfix 无队列拒绝

tag-icon • tag-icon postfix email-server dovecot smtpd
Postfix 无队列拒绝

我拥有一个虚拟服务器和多个域名。该服务器主要用于网站，但我还设置了后缀和鸽舍发送邮件。一切正常。即使对于不同的域，我也可以添加user，alias并且domain在MySQL数据库，发送和接收邮件。
每天我都会在我的数据库中发现这个奇怪的条目mail.log：

postfix/smtpd[29295]: NOQUEUE: reject: RCPT from mx1.tld-mx.com[41.222.33.24]: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in virtual mailbox table; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<mx1.tld-mx.com>

此日志消息每天早上大约出现4:35服务器时间，我真的不知道如何处理它。我是否以错误的方式配置了我的服务器？或者这是一个正在扫描我的机器的机器人？

我的main.cf

# cat /etc/postfix/main.cf
# See /usr/share/postfix/main.cf.dist for a commented, more complete version


# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

myhostname = mydomain.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
#mydestination = example.com, hostname.example.com, localhost.example.com, localhost
mydestination = localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all

smtpd_tls_cert_file = /root/CA/certs/server.crt
smtpd_tls_key_file = /root/CA/private/server.key
smtpd_tls_CAfile = /root/CA/certs/ca.crt
smtpd_use_tls = yes
smtpd_tls_auth_only= yes

#Enabling SMTP for authenticated users, and handing off authentication to Dovecot
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes

smtpd_recipient_restrictions =
    permit_sasl_authenticated,
    permit_mynetworks,
    reject_unauth_destination,
    reject_unlisted_recipient

#Handing off local delivery to Dovecot's LMTP, and telling it where to store mail
virtual_transport = lmtp:unix:private/dovecot-lmtp

#Virtual domains, users, and aliases
virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf

答案1

这是由CanIt 声誉列表；它基本上可以确保您不是一个开放中继，就好像您的服务器接受了邮件并将其送回他们的服务器一样，您最终会被列入他们的黑名单（OpenRelay）。

您可以放心地忽略这些条目以及其他包含Recipient address rejected: User unknown in virtual mailbox table;

答案2

该日志条目看上去完全正常。

从技术层面上讲，您的服务器会收到一封收件人地址无效的电子邮件并拒绝它。

该地址（以及每日重复）表明有人故意检查配置错误。也许您的 vServer 提供商会进行检查，以防止意外捕获所有域或开放中继的问题。

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