How to create a Enterprise email account like

Honestly, if you have to ask this question, I'd suggest you'd be better off using something like Google Apps hosting with a custom domain for your email (you can split web hosting and email hosting for a given domain between different servers/services pretty easily).

I personally find that running a small mail server is more trouble than it is worth. Too much hassle dealing with spam and abuse.

thanks for your kind advice.

@eas:

Honestly, if you have to ask this question, I'd suggest you'd be better off using something like Google Apps hosting with a custom domain for your email (you can split web hosting and email hosting for a given domain between different servers/services pretty easily).

I personally find that running a small mail server is more trouble than it is worth. Too much hassle dealing with spam and abuse.

Until this happens:

Google Apps Login and Admin Console Down

https://news.ycombinator.com/item?id=5564015

To the OP though, even with their downtime, I agree Google Apps is probably your best route, I used to run Citadel, found it easy to set up, then there was a problem and I couldn't get it upgraded successfully.

So I switched to postfix/docecot/mysql using a Linode library article, which was out of date and required me to intuit a lot which is why I'm not putting the link here. This route may not be for you. It takes a lot of technical prowess to make this combination work. I add users with SQL queries, for example.

If you aren't into Google Apps or roughing it with postfix/dovecot then you might want to check out Zimbra, I've never tried it but it might something that could work for you, it's supposed to be enterprise class:

http://www.zimbra.com/