Hi guys, For some reasons I cannot send mails to some domains, I get an error message saying; There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <ewn-lges007.econet-nigeria.com #5.5.0 smtp;552 Put ,E=\r\n at the end of Mether, Mtcp, or Msmtp in sendmail.cf if you are using Solaris 2.5 (fixed in 2.5.1). I cannot accept messages with stray newlines. Many SMTP servers will time out waiting for \r\n.\r\n.> I cant seem to understand why I get these messages. Could anyone please help on a resolution to this problem. Thanks