Hi thanks for response. I am little bit confuse in below basic things. 1.for mail server domain name registration is mandatory with ISP or any alternate solution available 2.the difrence between smtp relay & smtp domain . 3.after registering domain name mx record will update in my private server or ISP server. Thanks satya

You need a reverse DNS record for the external IP of you Exchange Server. Check this out: http://joserebellon.wordpress.com/.

On Thu, 4 Aug 2011 06:04:50 +0000, satya11 wrote: >i have private mail server which is working fine internally. Now i want to send & receive mail from external domain . > >can you please let me know what to be register with isp so that i can send & receive mail from external domain . Assuming the ISP manages your external DNS, you need the noral complement of DNS resource records for the domain (SOA and NS). For e-mail you'll also need a MX and A record and a PTR for the IP address your Exchange server uses to send e-mail. The name on the PTR should match the name in the corresponding A record. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

On Fri, 5 Aug 2011 12:24:24 +0000, satya11 wrote: > > >Hi thanks for response. > >I am little bit confuse in below basic things. > >1.for mail server domain name registration is mandatory with ISP or any alternate solution available If you manage the publically accessible DNS zone for the domain you can mane this yourself. You can manage the PTR records if you manage the in-addr.arps DNS zone for your network. >2.the difrence between smtp relay & smtp domain . A domain is just a name. A relay is a SMTP server that will accept messages for a domain and the send (relay) them to the next hop. >3.after registering domain name mx record will update in my private server or ISP server. It will update the DNS zone on any server that's a primary or secondary DNS for the zone. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Hi i have private mail server which is working fine internally. Now i want to send & receive mail from external domain . can you please let me know what to be register with isp so that i can send & receive mail from external domain . regards satya

Hi Satya, You also need to register MX record, A record.Best Regards!