我们正在推进 List-Unsubscribe 标头的实施,以遵守 Gmail 发件人指南。在进行测试时,我们注意到“从邮件列表退订”链接没有出现在收件人端的 Gmail 客户端中。
对于这个问题,有什么潜在的原因吗?
下面,我提供了标题数据(出于隐私考虑,一些信息被编辑)。
Delivered-To: ****@*******.***
Received: by 2002:a05:6520:4646:b0:283:91a:1adb with SMTP id el6csp795303lkb;
Thu, 7 Dec 2023 01:47:51 -0800 (PST)
X-Google-Smtp-Source: AGHT+IGkrxRIriFcwqWDTLZPZDyX5RuCa+ot/NqD6tt21gj6L277nrfC2x3Zl7JRzTu1QcYm9j7i
X-Received: by 2002:a05:6a20:1444:b0:187:eea9:73c5 with SMTP id a4-20020a056a20144400b00187eea973c5mr2887137pzi.3.1701942471560;
Thu, 07 Dec 2023 01:47:51 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; t=1701942471; cv=none;
d=google.com; s=arc-20160816;
b=GS5MDCFcvdw0Nx38THlBQmTf/KBckJf9kIS2ZKCVZoYvIdheBNA4vrTcYERxOILXIF
QCQohBLkTVeVO9y1em0tTS5d7CEduYlNWoR6ay+CLzQSxNbpKtxvU8ECapg3mkxaLjcQ
tDDAALDfRiDJxlsnrNmiITEBuVwNNmOldWXeUlKNN6OYqvBKqGaJghZS3B+HeoJ1AzjH
o9/db0wY7T/LtBekGHcfQvBu33oBZUWpLmaNbBnKupglvx0kEc9foRaBL98jISXNEKD9
uK4qxg4e421JDiaY+/w7yDjcNND0x38nhA4R8miCY4ujAm0J7AEyQTdXWVbbHqCojXyS
weqw==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
h=content-transfer-encoding:date:errors-to:from:list-unsubscribe
:list-unsubscribe-post:message-id:mime-version:subject:to;
bh=f6DQBjo8rYX19JpB+nIPzKzcW1UlXBE5kq7UPzfAJfg=;
fh=m4DbYAsBOnwc1IUh2REZnorY/4DwaOqFeBwm9y++uQU=;
b=qOyTVHWiNRQsIFjOQ/3BZwzjmympKlkaKuz0repcIqpRi4HPqh6XPA7xfTob34gamI
gbga9G4Cj+5QC350sOoJEIrCIENRvNPIgdi8jk58KuLBhmwGRUhi3IZkGkWSdac0gnfI
fvk11SsUHhFmfJIDbr31m8Vgm4kwbmknrdVbbkQKX1hSpcGpIZpYa34RkAyoJznGQJS6
CFxCQAT2KaJMcKQS3PPkSy+VPS9W4eJuDO4Bapdj+WcSwnZQ8aCWutAJ8dtDSZHteKIS
mBor2qgK2Qf3zuxvke8VAbKzoqqqooqA9RbbENf+IBawn3avvHTI1YXUM3A5JxW0wg3L
8+7Q==
ARC-Authentication-Results: i=1; mx.google.com;
spf=pass (google.com: domain of *****-*********-****************@*******.*** designates xxx.xxx.xxx.xxx …Run Code Online (Sandbox Code Playgroud) 我用 C# 编写了向多个用户发送邮件的代码。该电子邮件采用 HTML 格式,并包含取消订阅链接。
为了添加更多信息,我使用 SendGrid 向最终用户发送电子邮件。
我在 Gmail 中查看了原始邮件格式,并且可以在格式中看到标头
List-unsubscribe: <https..../usersettings?SubscriberId=VioR5IcgvSIosfB1w%2FCPfhpyGBdko%2BxsmFTAsQAemuWgSJkpTP1UeDg%2BW4frl59A0KVVpiK0lI7IrS3N1BCm0Sspd0dqEaJGlKHAY3g7IR3INwkyJEAmfU55TBJ8uEo%3D>
Run Code Online (Sandbox Code Playgroud)
但链接并未显示。我缺少什么?