godaddy email forward to yahoo fails due to 550 error, forward to gmail works fine

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there is no fix for this, unless yahoo changes their server settings. try using gmail instead.

after some debugging, because godaddy kept complaining about mx records, i followed this to the letter:

still didn’t work. when i checked the  bounce message, it was actually due to yahoo.

Google tried to deliver your message, but it was rejected by the server for the recipient domain by [].

The error that the other server returned was:
550 relaying denied for <>