我正在使用 SendGrid 中繼透過 Drupal 發送的電子郵件。儘管使用了 DKIM、DMARC、SPF、反向 DNS 等所有功能，但 Gmail 仍將註冊驗證電子郵件專門標記為垃圾郵件，我對此感到困擾……我已將 SendGrid 設定為使用 2 個專用 IP。
透過同一 CMS 發送的其他交易電子郵件不會發生這種情況（或至少我沒有收到那麼多來自用戶的報告）。所以我想知道這是否與電子郵件的副本有關（也許在主題中使用電子郵件和密碼一詞？）。
這是電子郵件：
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for <[email protected]>;
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Content-Type: multipart/alternative; boundary=953f2f71d3cc057b35d2548e10420b0c12b9e8296557c5bdcb71f06a9ab3
Date: Thu, 07 Sep 2023 09:36:43 +0000 (UTC)
From: Generation Global <[email protected]>
Mime-Version: 1.0
Subject: Confirm your email address and set your password
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--953f2f71d3cc057b35d2548e10420b0c12b9e8296557c5bdcb71f06a9ab3
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Dear Student,
Thank you for registering your account on Generation Global. Now we
just need you to confirm your email address so you can get started on
our site. Please click on the link below to confirm your email address
and set your password:
Confirm email and set password
[https://adventure.generation.global/student/reset/56170/1694079401/kwUczgz=
A5WnAsFB66rNpo-MzNYEzZ7QBT5uqsUW5QE0]
If you have any questions please contact our support at
generation.global/support [https://generation.global/support].
The Generation Global Team
--953f2f71d3cc057b35d2548e10420b0c12b9e8296557c5bdcb71f06a9ab3
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset=us-ascii
Mime-Version: 1.0
<p>Dear Student,</p>
<p>
Thank you for registering your account on Generation Global.
Now we just need you to confirm your email address so you can get started=
on our site.
Please click on the link below to confirm your email address and set your=
password:
</p>
<p><a href=3D"https://adventure.generation.global/student/reset/56170/16940=
79401/kwUczgzA5WnAsFB66rNpo-MzNYEzZ7QBT5uqsUW5QE0">Confirm email and set pa=
ssword</a></p>
<p>If you have any questions please contact our support at <a href=3D"https=
://generation.global/support">generation.global/support</a>.</p>
<p>The Generation Global Team</p>
<p><img alt=3D"Generation Global" src=3D"https://generation.global/android-=
chrome-192x192.png" style=3D"height:120px; width:120px" /></p>
<img src=3D"http://mail.generation.global/wf/open?upn=3DCGUeh9-2FN5rG1LZ-2B=
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=3D"0" style=3D"height:1px !important;width:1px !important;border-width:0 !=
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m:0 !important;padding-right:0 !important;padding-left:0 !important;"/>
--953f2f71d3cc057b35d2548e10420b0c12b9e8296557c5bdcb71f06a9ab3--
完整詳細資料： https://www.mail-tester.com/test-noj289t8t
編輯：在進行另一次測試後，我發現了一個顯然 DMARC 失敗的實例：https://www.mail-tester.com/test-tri7i0dx9&reloaded=1
我不知道為什麼會這樣，因為該電子郵件來自透過 DMARC 的電子郵件的相同 IP 位址，所以我很難理解出了什麼問題。
關於為什麼它們被標記為垃圾郵件有什麼想法嗎？
答案1
任何電子郵件服務提供者都有自己的偵測垃圾郵件的秘訣 - SPF、DKIM 和 DMARC 在其中發揮作用，但它們只驗證電子郵件的來源。沒有一家提供者會確切地告訴您他們的規則如何運作，原因有兩個：
- 它使垃圾郵件發送者更容易繞過規則
- 提供者通常不知道他們的某些過濾器是如何工作的
所以沒人能回答你的問題。
你正在做正確的事情（儘管你的 RMX 有點做作 - OTOH - 你無法更改這一點，因為它由 Sendgrid + Sendgrid 的託管控制/RMX 已被棄用，儘管一些提供者仍在使用它）。
我在這裡唯一注意到的是可能對智慧財產權的幫助是增加一個取消訂閱標頭。