This script basically keeps an eye on SP_WHO2 for any process that is blocking another process. If it finds one it gathers all the needed information and creates an email that is sent to the passed address.
There are comments where you need to fill in your company specific information. Databases, email addresses, email profile name...etc...
This script includes a table create script for storing the history of the blocking.
It includes a stored procedure for capturing the data and calling a send mail script.
It includes the send mail script if you don't already have send mail script.
It includes the script to create the job that will watch for blocks every 2 minutes.