Replied Emails Not Being Delivered

I send an email. Responder adds info and hits return. Responder recieves an undeliverable notice. Why has my returned messages been hijacked? The address given is

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Answer #1: Posted by Odin on February 22nd, 2014 8:01 AM

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Odin

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This is probably the result of the huge problem affecting some Yahoo users. See http://techcrunch.com/2014/02/04/yahoo-goes-down/.

Hope this is useful. Please don't forget to click the Accept This Answer button if you do accept it. My aim is to provide reliable helpful answers, not just a lot of them. See https://www.helpowl.com/profile/Odin.

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