Postfix Mail Server

Hi Friends,

we have created a mail campaign through website to send and receive mails. we have lot of clients, all the clients have sepate email id with the domain name. our need is we want to see the client mails in our mail box.
for example any one send mails to any clients that mail we need receive and view
can you any one help me how we can achieve this.
Thanks in advance

@saransai , welcome. this is relatively straightforwards. However, can you say why you want to do this and are your clients aware of this snooping ?