Hello,
I have a idea about create a "have-your-mail" site.
There some Tip what should help me ?
Like some ready to use scripts, panels, tools ?
My site will use my country whois, so i need a solution that can be "programmed"

Hmm, you're looking to be a webmail provider? Have you looked at the open-source webmail systems out there as a starting point?
-mike

I want sell the "have your email name".
Like, the person is called "Mike Limestone", i want sell a domain to him, and control the email.
I can do that with :
-cPanel and Whmcs : The drawback is that cPanel control panel is oriented to hosting, not to email.
- Or Whmcs and write myself a controlpanel that manage the postfix entries.
But i was thinking if already had a "Ready" solution for this, or i will have to write myself a panel.

I've heard of software's such as Jillmail. They are similar to hotmail and gmail.

I dont know how to start a email company, but I just want to say, Make sure you have a decent Spam Filtering System, if you get a really good one, more people will be likely to use it.

You could use WHMCS and really any control panel - all you need to do is disable the web hosting portion of the plans you sell, just have email?