Hi guys we are usin mdaemon as the mail server and since the past two days when sendind mail to public accounts like yahoo the below mail appears.Any clue on what can be wrong. -------------------------------------------------------------------------- MDaemon Delivery Status Notification - http://www.altn.com/dsn/ -------------------------------------------------------------------------- The attached message had PERMANENT fatal delivery errors. After one or more unsuccessful delivery attempts the attached message has been removed from the MDaemon mail queue on this server. The number and frequency of delivery attempts are determined by local configuration. -------------------------------------------------------------------------- YOUR MESSAGE WAS NOT DELIVERED TO ONE OR MORE RECIPIENTS