I am using postfix as a SMTP server on a network that does not have internet connection. I would like to configure every mail client to send mail to the postfix SMTP server. When the server receive a mail, it can't deliver it because it is not connected to internet, so I want it to save the mail in a file. I will then handle this file myself to send it when possible.
Is it possible to use postfix as describe above? Could you give me some advice to acheive this?