後綴 noqueue 拒絕

我有自己的虛擬伺服器和多個域。該伺服器主要用於網站，但我還設置了postfix和dovecot來傳遞郵件。一切都按預期工作。即使對於不同的域，我也可以添加user，alias並domain在MySQL數據庫中發送和接收郵件。

每天我都會在我的mail.log：

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

此日誌消息每天早上大約在伺服器時間4:35出現，我真的不知道如何處理它。**我是否以任何錯誤的方式配置了我的伺服器？**或者這是一個掃描我機器的機器人？

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

這是由CanIt Reputation list執行的檢查；它基本上確保您不是一個開放中繼，就好像您的伺服器會接受郵件並將其發送回他們的伺服器，您最終會進入他們的黑名單（OpenRelay）。

您可以放心地忽略這些條目以及其他包含Recipient address rejected: User unknown in virtual mailbox table;

該日誌條目看起來完全正常。

在技​​術層面上，您的伺服器會收到一封包含無效收件人地址的電子郵件並拒絕它。

地址（和每日重複）暗示有人故意檢查配置錯誤。也許您的 vServer 提供商會檢查以防止意外擷取所有域或打開中繼出現問題。

引用自：https://serverfault.com/questions/559510