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Postfix 备份 mx 服务器的反向散射中继导致垃圾邮件 (553 5.7.1)

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Postfix 备份 mx 服务器的反向散射中继导致垃圾邮件 (553 5.7.1)

我有 2 个 Postfix 服务器

  • MAIN.mail.example.com
  • BACKUP.mail.example.com

问题场景：

  1. 如果垃圾邮件发送者将“我”的电子邮件直接发送到备份服务器，服务器会将其转发到主服务器

  2. 主服务器拒绝向我发送邮件reject mail said: 553 5.7.1 <[email protected]>: Sender address rejected: not logged in (in replyto RCPT TO command)

如何避免这种反向散射？我可以在哪里设置 BACKUP 或 MAIN 来避免这种错误消息？

消息 RAW

Return-Path: <>
X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on MAIN.mail.example.com
X-Spam-Level: *
X-Spam-Status: No, score=1.8 required=5.0 tests=BAYES_50,RDNS_DYNAMIC,
SPF_HELO_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.1
X-Original-To: [email protected]
Delivered-To: [email protected]
Received: from BACKUP.mail.example.com (IP.eu [IP])
by MAIN.mail.example.com (Postfix) with ESMTPS id 1A62C1800A9
for <[email protected]>; Fri, 12 Oct 2018 16:30:15 +0200 (CEST)
Received: by BACKUP.mail.example.com (Postfix)
id C4DF37D059; Fri, 12 Oct 2018 16:30:14 +0200 (CEST)
Date: Fri, 12 Oct 2018 16:30:14 +0200 (CEST)
From: [email protected] (Mail Delivery System)
Subject: Undelivered Mail Returned to Sender
To: [email protected]
Auto-Submitted: auto-replied
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
boundary="13C687D03F.1539354614/BACKUP.mail.example.com"
Content-Transfer-Encoding: 8bit
Message-Id: <[email protected]>

This is a MIME-encapsulated message.

--13C687D03F.1539354614/BACKUP.mail.example.com
Content-Description: Notification
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit

This is the mail system at host BACKUP.mail.example.com.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<[email protected]>: host MAIN.mail.example.com[IP] said: 553 5.7.1
<[email protected]>: Sender address rejected: not logged in (in reply to
RCPT TO command)

--13C687D03F.1539354614/BACKUP.mail.example.com
Content-Description: Delivery report
Content-Type: message/delivery-status
Content-Transfer-Encoding: 8bit

Reporting-MTA: dns; BACKUP.mail.example.com
X-Postfix-Queue-ID: 13C687D03F
X-Postfix-Sender: rfc822; [email protected]
Arrival-Date: Fri, 12 Oct 2018 16:30:13 +0200 (CEST)

Final-Recipient: rfc822; [email protected]
Original-Recipient: rfc822;[email protected]
Action: failed
Status: 5.7.1
Remote-MTA: dns; MAIN.mail.example.com
Diagnostic-Code: smtp; 553 5.7.1 <[email protected]>: Sender address rejected:
not logged in

--13C687D03F.1539354614/BACKUP.mail.example.com
Content-Description: Undelivered Message
Content-Type: message/rfc822
Content-Transfer-Encoding: 8bit

Return-Path: <[email protected]>
Received: from tools.wormly.com (tools.wormly.com [96.126.113.160])
by BACKUP.mail.example.com (Postfix) with ESMTPS id 13C687D03F
for <[email protected]>; Fri, 12 Oct 2018 16:30:13 +0200 (CEST)
Date: Fri, 12 Oct 2018 14:30:12 +0000
To: [email protected]
From: Wormly SMTP Test <[email protected]>
Subject: Wormly SMTP Test Message
Message-ID: <[email protected]>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1

This message was sent using the Wormly SMTP testing tool by this user:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0 Safari/605.1.15



--13C687D03F.1539354614/BACKUP.mail.example.com--

BACKUP.mail.example.com

smtpd_relay_restrictions =
  permit_mynetworks,
  permit_sasl_authenticated,
  reject_unauth_destination

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