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A comment on How does the Gmail unsubscribe button work?. Parent comment

Re:How does the Gmail unsubscribe button work? by judge2020 on Friday May 29, 2020 @04:08PM (#23354892)
No, a reputable bulk mailing service can still send from their customers' principal domains with spf/dkim set up to include that service's info.
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Re:How does the Gmail unsubscribe button work? by inetknght on Friday May 29, 2020 @04:11PM (#23354912)
> No, a reputable bulk mailing service can still send from their customers' principal domains with spf/dkim set up to include that service's info.

Tell that to the links in the email that go to the reputable service's click aggregation service.

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