Delivery to the following recipient failed permanently:

 kgj.business@yahoo.com

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain yahoo.com by mta6.am0.yahoodns.net. [63.250.192.45].

The error that the other server returned was:
554 delivery error: dd This user doesn't have a yahoo.com account (kgj.business@yahoo.com) [-5] - mta1569.mail.gq1.yahoo.com

This also happens with the other Yahoo address I created ...