4.11 Where is qmail/ezmlm/djbdns?
Dan J. Bernstein distributes
software he has written with a restrictive license, consequently,
it's in the non-free area. Since the license he uses does not allow modified
binaries to be distributed, you have to compile it yourself from the source and
the Debian patches to obtain a binary package you can install in your Debian
The source package names are
qmail you need to install
qmail-src first and
build-qmail to build the Debian package. You also need
to do install the
ucspi-tcp-src package to get ucspi-tcp, which
qmail depends on.
Dan J. Bernstein maintains a
FAQ from distributors page
if you are interested in reading his reasons (one of which is