Differences Between Exchange Server 2003 and Exchange Server 2007
New features in Exchange Server 2007:
– open proxy detection to help prevent Denial of Service (DOS) and spam attacks
– edge transport service resilience for inbound SMTP message receipt rate control – enables high availability
– dynamic analysis of sender reputation
– Microsoft Office Outlook e-mail postmark validation
Exchange Server 2007 in production environment only support 64-bit operating system.