Please help me resolve this ...
Delivery to the following recipient failed permanently:
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. [22.214.171.124].
The error that the other server returned was:
554 delivery error: dd This user doesn't have a yahoo.com account (firstname.lastname@example.org) [-5] - mta1569.mail.gq1.yahoo.com
This also happens with the other Yahoo address I created ...