Finally.  Exchange 14 is now officially Exchange 2010.  Learn more at http://technet.microsoft.com/en-us/exchange/2010/default.aspx .

To return to part 1 click here Transport POP3 and IMAP4 In Exchange 2003, POP3 and IMAP4 were both receive-only protocols that enabled a client to receive e-mail. To send e-mail, these clients had to relay SMTP traffic through the Exchange organization...

To return to part 1 click here Transport Outbound SMTP connections to other messaging servers In Exchange 2003, the routing group represented a communication boundary between Exchange servers that were part of the same organization. All Exchange servers...

To return to part 1 click here Transport Disclaimer messages In Exchange 2003, you needed to create a custom event sink to apply disclaimers to messages or purchase a third part application that would do this for you. In Exchange 2007, disclaimers are...