I was looking for an good alternative application to manage multiple domains, ftp accounts and mail accounts.
There are multiple applications but I tried the SysCP[1] online Demo[2]. This was exactly that what I wanted to have! So I downloaded it and installed it on a virtual machine.

The default configuration works fine on a Linux Debian 5.0 Lenny[3] www.debian.org. I had to investigate more time to setup the exim4[4] www.exim.org with mysql support, greylisting[5] www.tldp.org and antispam with spamassassin[6].

But now, all this stuff is running really fine and I need only 5 minutes to add a new customer with the full program :-).

[1] www.sysc.org
[2] www.sysc.org - online Demo
[3] www.debian.org
[4] www.exim.org
[5] www.tldp.org
[6] roman.mainer.de