I happily reference the FTC documentation of this act whenever I see spam coming in after having unsubscribed. Funny, I can’t seem to recall any instance where the spam then continued...
> We've added new features to Azure! Read this advertisement!
> ...
> This message from Microsoft is an important part of a program, service, or product that you or your company purchased or participates in. Microsoft respects your privacy.
> [Lack of unsubscribe intensifies]
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with no option to unsubscribe
Just to make it clear - I'm not working for Microsoft or anything like that.