I'm afraid to respond to the OATH Terms of service email.
It looks like a scam and has links to some OATH.com I never heard of. Pretty strange this coming out of the blue and no news article announcing any Yahoo/Verizon/AOL project or what it is. Pretty poor planning to insure failure, or else there is a new Yahoo scam going on.
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Thanks for your post!
Please review this help article: https://help.yahoo.com/kb/account/sln2070.html for more information.
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Yahoo Support