Exchange Admin Guide - http://www.microsoft.com/technet/prodtechnol/exchange/2003/library/admingde.mspx

DNS

How To Configure the SMTP Connector to Link to Internet Domains in Exchange

http://support.microsoft.com/default.aspx?scid=kb;en-us;319426

http://support.microsoft.com/default.aspx?scid=kb;en-us;322856

 

Monitoring

and Maintenance

  Chapter 13 - Exchange Monitoring and Maintenance (TRAINING KIT)

SMTP (Virtual Server)

ODBC Logging

Test Out Chapter 6