讓我們假設一下，我客戶的網站是thatshowithappened.com
幾週前我們的伺服器是一個開放中繼，我們修復了這個問題。
現在放了之後
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
smtpd_recipient_restrictions =
reject_invalid_hostname,
reject_non_fqdn_hostname,
reject_unknown_sender_domain,
reject_unknown_recipient_domain,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unlisted_recipient,
permit_mynetworks,
permit_sasl_authenticated,
reject_unauth_destination,
reject_rbl_client zen.spamhaus.org=127.0.0.[2..11]
# check_policy_service inet:127.0.0.1:10101,
reject_rbl_client zen.spamhaus.org,
reject_rbl_client bl.spamcop.net,
reject_rbl_client psbl.surriel.com,
# reject_rbl_client dnsbl.sorbs.net,
reject_rbl_client b.barracudacentral.org
它成功了，我不小心刷新了訊息佇列，現在我不知道哪個腳本負責發送垃圾郵件，因為我已經檢查過它不是一個CRON Job，所以這就是進入我的郵件日誌的內容
Mar 20 06:39:53 thatshowithappened postfix/smtpd[1413]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:39:57 thatshowithappened postfix/smtpd[1411]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:00 thatshowithappened postfix/smtpd[1413]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:03 thatshowithappened postfix/smtpd[1411]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:07 thatshowithappened postfix/smtpd[1413]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:10 thatshowithappened postfix/smtpd[1411]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:13 thatshowithappened postfix/smtpd[1413]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:16 thatshowithappened postfix/smtpd[1411]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:19 thatshowithappened postfix/smtpd[1413]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:22 thatshowithappened postfix/smtpd[1411]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:31 thatshowithappened postfix/smtpd[1411]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:35 thatshowithappened postfix/smtpd[1413]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:38 thatshowithappened postfix/smtpd[1411]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:41 thatshowithappened postfix/smtpd[1413]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:44 thatshowithappened postfix/smtpd[1411]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:48 thatshowithappened postfix/smtpd[1413]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:50 thatshowithappened postfix/smtpd[1411]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:54 thatshowithappened postfix/smtpd[1413]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:40:57 thatshowithappened postfix/smtpd[1411]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:41:00 thatshowithappened postfix/smtpd[1413]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:41:03 thatshowithappened postfix/smtpd[1411]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/104.168.142.169; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<hwsrv-234497.hostwindsdns.com>
Mar 20 06:41:07 thatshowithappened postfix/smtpd[1413]: NOQUEUE: reject: RCPT from hwsrv-234497.hostwindsdns.com[104.168.142.169]: 554 5.7.1 Service unavailable; Client host [104.168.142.169] blocked
看起來好像有一個單字詞典垃圾郵件發送者正在使用我們自己的網域thatshowithappened.com，我不知道在哪裡查看或至少如何知道訊息頭訊息之後已經發送或者拒絕如上。
我嘗試過
mailq，postqueue -p
但它總是空的，這是真的，因為訊息不在隊列中，也沒有延遲，對吧？
# postcat -q 4DEC51723309
postcat: fatal: open queue file 4DEC51723309: No such file or directory
CPU在90% - 100%之間，所以雖然它沒有發送SPAM，但它殺死了我的機器（運行Postfix 2.x的Centos7）。
你建議我們做什麼？還有其他方法可以調試這個嗎？
PS：我已經啟用了PHP 標頭以便追蹤哪個腳本正在發送垃圾郵件 mail.add_x_header = On mail.log = /var/log/phpmail.log
順便說一句，我希望問題不是這樣的“我的電腦無法運作。怎麼辦？」：D
我嘗試過查看其他問題喜歡這與我的類似，但沒有運氣。
請協助。
答案1
您發布的日誌條目顯示其他一些電腦正在嘗試透過您的郵件伺服器中繼垃圾郵件，但您的郵件伺服器拒絕它們。
如果這導致 CPU 負載過高，請考慮暫時對遠端 IP 位址設定防火牆，使其無法再連線。這應該會立即帶來緩解。
iptables -I INPUT -s 104.168.142.169 -j DROP
您也可以使用fail2ban 來執行此操作，因為它已經預先配置了處理postfix 日誌的監獄；它們只需要啟用即可。例如，輸入您的jail.local：
[postfix]
enabled = true