PHP Webmail Software that allows for multiple accounts?

[onlinesrc]

So, I'm in the market for a good email client that I can access online because I'm constantly on the road and don't always have access to my PC where I'm running a desktop version of Thunderbird.

I actually oversee several email accounts which is why I love Thunderbird; it creates several inboxes and allows me to stay organized.

The problem with most webmail options is that they limit you to one email address per login. The only way to access several accounts at once, is to open several applications of Webmail in several different browser tabs. As you could imagine, it's a bit of a mess.

Does anybody know of anything that is like a self hosted version of Thunderbird? Something that would work using PHP and mySQL? I found an option called AfterLogic but it requires ASP.NET to run it.

Or maybe somebody could explain to me why this is not possible with PHP? I asked because I've been searching around the web and many customers desire this, and many PHP developers are baffled.

[Klemen]

The solution for you would probably be to use IMAP protocol instead of POP3 to read mail (both are supported by CPanel).

With POP3 email is downloaded to your PC, but with IMAP email stays on the server so you can ready it from any PC.