From: "Mail Delivery System" <Mailer-Daemon@mydomain.com> To:nobody@mydomain.com Subject: Mail delivery failed: returning message to sender Hey Dp, i need help here, i m unable to send any email from my server. i m running a VBulletin forum, and i have a VPS, i get this email everyday in the amount of 100+... so can some1 please tell me how to fix this.. below is the message body... thnxx