如何在我的生产机器上接收与域有关的所有电子邮件？

I have a strange requirement, any website user(not linux system user) will be getting a email id, say [email protected],[email protected] with which they are going to have a inbox feature built into their dashboard. Any outside user(can be anyone on the planet/not precisely my website user) can email this [email protected] and jack receives email at her inbox(built into her dashboard). To accomplish this, I think, the following are the prerequisites:I have a strange requirement, any website user(