website based Client contact database

need a place either part of my joomla site new that we could log into and store customers info. Name, address, ph#, email, etc? We want it very simple but would like to group clients or be able to search for clients. We would also like to be able to send eblast to customers. would love if it worked with my current joomla site and could control it from the front end. Please explain what you would do/use or option that I have.