i will give you the details you need
27 freelancers are bidding on average £22 for this job
Noting is clear from your project. It would be better if you can discuss more in details about requirements on chat About myself https://www.freelancer.com/u/redssr.html
Hello, I'll explain your the opensource program like centos, postfix and linux. Please initiate a chat session so we can discus more about it. thank you.