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Yes of course I can unsubsribe from reputable 'known' mailers if I want to."
You can but too many people use the spam button.

Spam reporting isn't just about your account, its about identifying who to block for everybody. Your provider isn't going to blacklist somebody just on your say so.

If YOU want to block a particular sender then you block the address or the sender's domain.

Oh, and do check your spam filter settings, if there has been an upgrade or other change then they may have been reset. That shouldn't happen but it does.