Catchall email setup

I have a dedicated linux server. What i need is someone to setup a catch all email system on it. I will purchase about 50 domains or more and i need a system put on the server that will take all these 50 domains and any email sent to them will be put in the same place. The best way to go about this is where i can access the emails through pop3. I dont only want you to setup the system but i also need whomever takes on the project to instruct me on how to take out domains in the system and add new ones.