hi,

lastday rebooted my server . after that some mail's are failed . error show's like follow's ...... while we send the mails to some where ...
Sep 10 10:31:35 XXXX postfix/smtpd[1602]: warning: 200.106.118.129: hostname client-200.106.118.129.speedy.net.pe verification failed: Name or service not known


what's the problem ? .how to solve this one ? . please any can help me

thanks