Hi all We are using the exchange server 2003 some of our users are onsite their outlook is configured with pop3 and smtp some of them are complaining that they are not able to send mails to external people like yahoo or rediff using the Smtp server and they are getting the error saying that smtp server is not able to relay the Outbound mails. can some body help me on this is there any settings to be change in smtp server -- Thanks & Regards A.JITHENDRA NATH REDDY. Systems Administrator Network Solutions-An IBM Company