This is our small contribution to the Open Source community. Without them we would have right-clicked Exchange, seen that the feature we need is not (yet) implemented and calmly put an announcement on our site saying "Sorry, this wizard can't help you."
This is a collection of various useful qmail hacks we needed at some point in time and written ourselves.
We are Mihnea Balta and Costin Grigoras, currently working for VoDaNET. Our email addresses are firstname.lastname@example.org and email@example.com (guess who's who ;) )
We have developed and tested these packages on Linux. However, they should work with minor or none modifications on other Unices (FreeBSD comes to mind). We would like to recieve feedback about other platforms and if we can get access to a specific OS we'll make it work on it too. It won't work on Windows or any other non-*NIX OS. *NIX rules.
Only ours, for now. We run this software on mymail.ro, one of the biggest free webmail providers in Romania. That should give you some minimal amount of trust in the feasability of this software and assure you that when a problem arises it will be solved A.S.A.P. ;)