elstar.com.au

This is an Exchange Server 2007 default config in SBS Server 2008 64bit with no ASSP Spam Proxy.
Organisation Configuration
Hub Transport
Accepted Domains
mydomain.com.au
mydomain2.com.au
Send Connectors
Internet Email
FQDN: mail.mydomain.com.au
no maximimum message size is set
Address Space: SMTP * 1
Network: Route Mail through Smart Host: mail.bigpond.com
Source Server: myserver Default-First-Site-Name Mailbox, Client Access, Hub Transport
Windows SBS Internet Send MYSERVER
FQDN: remote.mydomain.com.au
Maximum Message Size: 20240
Address Space: smtp * 1
Use domain name system (DNS) "MX" records to route mail automatically
Source Server: MYSERVER Default-First-Site-Name Mailbox, Client Access, Hub Transport

Server Configuration
Hub Transport
Receive Connectors
Default MYSERVER
Windows SBS Fax Sharepoint Receive MYSERVER
Windows SBS Internet Receive MYSERVER

Default MYSERVER
FQDN: MYSERVER.localdomain.local
maximum message size: 10240
NetworK
Local Ip Receive Mail: 192.168.101.2 25
Remote receive mail ip: 192.168.101.0- 192.168.101.0
192.168.101.2- 192.168.101.255
AUTHENTICATION: TLS, Basic, Office Basic only after starting TLS, Exchange Server authentication, Integrated Windows authentication
Permission Groups: Anonymous, Exchange Users, Exchange Servers, Legacy Exchange Servers
Windows SBS Fax Sharepoint Receive MYSERVER
FQDN: MYSERVER.localdomain.local
maximum message size: 10240
NetworK
Local Ip Receive Mail: 127.0.0.1 25
Remote receive mail ip: 127.0.0.1-127.0.0.1
AUTHENTICATION: Basic
Permission Groups: Anonymous, Exchange Users

Windows SBS Internet Receive MYSERVER
FQDN: remote.mydomain.com.au
maximum message size: 20240
NetworK
Local Ip Receive Mail: 192.168.101.2 25
Remote receive mail ip: 0.0.0.0-192.168.100.255
192.168.100.1-192.168.100.1
192.168.102.0-255.255.255.255
AUTHENTICATION: TLS
Permission Groups: Anonymous