DNS issue

view story

http://www.unix.com – Hi, I have recently built a new DNS server and created a new zone. I use an ESMTP server to handle mail and the new domain has been added to this. I can send mail to gmail and other domain addresses but unable to send it to one particular domain. (DSN:Service Unavailable) DNS appears correct and I can dig all domains etc. Anybody know what needs to be done in order to deliver the mail from the new domain address? R, D. ()