Qmail or Postfix?

Hi!

I run my own webhosting company. I use Qmail normaly with Qmailadmin. It works great. But I have now got over to Postfix. And I'm a little insecure about what administrator interface i should use. Does anybody know about a tool for admining Postfix?

If you are coming from a legacy sendmail environment postfix might be good option, it relay servers, spam/virus gateways, backup mx servers etc, otherwise Qmail is fine.