This is a steps How To Configure Exchange Email Account in Outlook 2007
Example : We will configure it in Windows XP client.

Click Start >> Control Panel >> Mail

You will see a screen like below :

Click Show Profiles and you will see a next screen below :

What is Backup Mailserver / Secondary Mailserver ?

When your mail server is not accessible by others you have a chance of losing valuable emails. These lost emails can result in lost sales and loss revenue. You can prevent this today by using Backup Mail Service/ Secondary Mailserver.

What is Mailcleaner ?

Download Mailcleaner ISO

You need to download Mailcleaner ISO from this URL http://www.mailcleaner.org/doku.php/downloads:latest
Download it and Burn it into a CD.

Installing Mailcleaner ISO

Here is a fastest way to fixed your dovecot if you have found any error while loading shared libraries : libsepol.so.1

If you have a centos 5.x and RHEL 5.x this error will appear when you try to running dovecot imap server.

Error shows from maillog:

Jan 21 12:01:10 athena dovecot: pop3-login: pop3-login: error while loading shared libraries: libsepol.so.1: failed to map segment from shared object: Cannot allocate memory

You can fixed this by edit a dovecot.conf

Here is a simple steps to disable Sendmail on your FreeBSD server,

You can try these two methods:

1. If you don't want to restart your server, you can try this command

$/etc/rc.d/sendmail stop

2. You can also disable Sendmail at the startup config file, you'll need to change the following 4 lines in /etc/defaults/rc.conf

[code]$nano /etc/defaults/rc.conf 

## change below to NO