wtf

Does anyone keep getting this error?

Delivery to the following recipient failed permanently:

tuning@yahoogroups.com

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the
recipient domain. We recommend contacting the other email provider for
further information about the cause of this error. The error that the
other server returned was: 553 553 sorry, that domain isn't in my list
of allowed rcpthosts (#5.7.1) (state 14).

-Mike