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Postfix 使用 TLS 发送，但递送通知 (DSN) 邮件中没有信息

tag-icon • tag-icon ssl postfix dsn
Postfix 使用 TLS 发送，但递送通知 (DSN) 邮件中没有信息

我有一个 Postfix 服务器，它运行着 DKIM 和 SMTP 的 TLS，并且还配置了 SMPTD。当我向我的 Gmail 帐户发送测试邮件时，它总是显示Standard-Encryption TLS正常。标题也显示Received: ... (version=TLS1_2) ...。

奇怪的是，交货通知邮件中似乎没有关于成功使用 TLS 的提示。

  1. 有人能帮助我了解该信息在报告邮件中保存的位置吗，或者如何配置 DSN 以清楚地显示使用了 TLS？

  2. 如果这不可能，有什么其他想法吗？我需要一张收据来证明邮件是以任何方式使用 TLS 发送的。

DN 的内容如下：


Your message was successfully delivered to the destination(s)
listed below. If the message was delivered to mailbox you will
receive no further notifications. Otherwise you may still receive
notifications of mail delivery errors from other systems.

                   The mail system

<xxx>: delivery via spamassassin: delivered via spamassassin
    service
Reporting-MTA: dns; xxx
X-Postfix-Queue-ID: DD1BD7F427
X-Postfix-Sender: rfc822; xxx
Arrival-Date: Thu,  1 Feb 2024 10:28:35 +0100 (CET)

Final-Recipient: rfc822; xxx
Original-Recipient: rfc822;xxx
Action: relayed
Status: 2.0.0
Diagnostic-Code: X-Postfix; delivery via spamassassin: delivered via
    spamassassin service
Return-Path: <xxx>
Received: from xxx (xxx [xxx])
    by xxx (Postfix) with ESMTP id DD1BD7F427
    for <xxx>; Thu,  1 Feb 2024 10:28:35 +0100 (CET)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=xxx; s=mail;
    t=1706779715; bh=xxx;
    h=Date:From:To:Subject:In-Reply-To:References:From;
    b=xxx
MIME-Version: 1.0
Date: Thu, 01 Feb 2024 10:28:35 +0100
From: xxx <xxx>
To: xxx
Subject: Re: test 1234556
In-Reply-To: <36319b40fad3fbe0b9c34995e342fea8@xxx>
References: ...
User-Agent: Roundcube Webmail
Message-ID: <9811edce17dc01e4ce43a435b0c1ebf2@xxx>
X-Sender: xxx
Content-Type: multipart/alternative;
 boundary="=_72c61e5e13394bd306b6254a28f27cfb"```

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