The 12 Commandments of Exchange Deployments

For those looking for Exchange Server deployment recommendation here are the "12 Commandments of Exchange Deployments" from Brien M. Posey (MVP & MCSE):

1- Do not connect your mail server directly to the Internet
2- Do not use questionable hardware
3- Place Branch Offices into Routing Groups
4- Do Not Install Exchange on a Domain Controller
5- Make global catalogs globally accessible
6- Use a front end/back end configuration when possible
7- Purchase Exchange-level antivirus software before you deploy Exchange
8- Think about redundancy when setting up routing group connectors
9- Plan for patch management
10- Do not overload a single Exchange server
11- Have an antispam plan
12- Take a training class

Follow the link to get the details on each commandment:
The 12 Commandments of Exchange Deployments