Mailchimp 域 SPF 身份验证

Indeed this is not SPF; it's called delegation or, less charitably, cloaking. What happens is that you point a hostname in your domain at theirs, and then they are free to create SPF and DKIM records in their own DNS. This is done so that they are in control of the records rather than you, since getting end users to do DNS updates is often very difficult. It also means that the SMTP envelope sender of messages needs to use that same hostname so that the SPF and DKIM records match up.

虽然这对他们来说非常方便，但这种方法最近变得不受欢迎，因为它隐藏了第三方（因此是伪装名称）在个人数据处理中的参与。OTOH 他们没有尝试在其他领域符合 GDPR，所以这显然不是他们担心的事情，尽管如果您有任何欧盟订阅者，您应该担心！