No, you appear to be on a private network behind a router/firewall so you will need to setup a
Split DNS - Zimbra :: Wiki architecture. This is apparent for two reasons 1) Your server IP is 127.0.0.2 and when you perform the host lookup you get
Code:
host `hostname`
SLES10SRV01.gateway.2wire.net has address 189.177.192.171
SLES10SRV01.gateway.2wire.net has address 189.177.192.171
Host SLES10SRV01.gateway.2wire.net not found: 4(NOTIMP)