Mail Delivery Failure

[Mail Delivery System]

This message was created automatically by the mail system (ecelerity).

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

>>> adun.oyin at yahoo.com (reading confirmation): 554 delivery error: dd This user doesn't have a yahoo.com account (adun.oyin at yahoo.com) [-6] - mta1320.mail.bf1.yahoo.com
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <http://lists.alioth.debian.org/pipermail/pkg-mate-team/attachments/20160902/02869515/attachment-0001.ksh>