Testing and Deployment

• If you wish to use a static IP address, then change the /etc/network/interfaces file appropriately. Use the given template or run "# man interfaces" and read the bundled documentation.

• Add forward and reverse records for the target computer to your DNS.

• Configure your mail reader to use the target computer. Send and receive mail with local accounts.

• Enable mail relaying to external domains by adding your local network addresses to host_accept_relay field in the /etc/exim/exim.conf file.

• Send mail to an external domain through the target computer.

• When the target system is ready for production, add MX and CNAME records to your DNS as appropriate.