when I email 2 particular domains, I get some errors... not happening with anywhere else 1) Don't get that everytime we send mail to that domain, but sometimes we do... There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <my.mail.server.here #5.5.0 smtp;554 Transaction Failed"." on a line by itself> 2) Almost everytime we send to yahoo There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <my.mail.server.here #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.> What can I do to fix these from my end?