am0.yahoodns.net. 198.136.216.251. The error that the other server returned was: 554 delivery error: dd This user doesn't have a yahoo.com account mta 1132. mail.gq1.yahoo.com --- Original message --- ) [0] - DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-versio