The bottom line is that you can use qmail for any purpose, you can redistribute unmodified qmail source distributions and qualifying var-qmail binary distributions, and you can distribute patches to qmail. You can't distribute modified qmail source code or non-var-qmail binary distributions.
[^] # Re: Le guide IdealX des logiciels libres utilisables en production
Posté par ours Ours . En réponse à la dépêche Le guide IdealX des logiciels libres utilisables en production. Évalué à 1.
qmail is copyrighted by the author, Dan Bernstein, and is not distributed with a statement of user's rights. In http://cr.yp.to/softwarelaw.html,(...) he outlines what he thinks your rights are under U.S. copyright law. In http://cr.yp.to/qmail/dist.html(...) he grants the right to distribute qmail source code. Binary distributions are allowed under the terms described there and in http://cr.yp.to/qmail/var-qmail.html.(...)
The bottom line is that you can use qmail for any purpose, you can redistribute unmodified qmail source distributions and qualifying var-qmail binary distributions, and you can distribute patches to qmail. You can't distribute modified qmail source code or non-var-qmail binary distributions.