If you have downloaded binary RPM packages suitable for your system, you can quickly install them with the usual rpm command line:
% rpm -ihv milteroo-0.1-1.i386.rpm % rpm -ihv chainmail-0.3-1.i386.rpm
You don't need to install milteroo-devel package, unless you want to recompile chainmail from source.
If you have downloaded source RPM packages, first build milteroo package:
% rpm --rebuild milteroo-0.1-1.src.rpm
Then install the compiled packages:
% rpm -ihv milteroo-0.1-1.i386.rpm % rpm -ihv milteroo-devel-0.1-1.i386.rpm
Once milteroo is installed, you can build and install chainmail:
% rpm --rebuild chainmail-0.3-1.src.rpm % rpm -ihv chainmail-0.3-1.i386.rpm
Note: with newer versions of RPM you may need to use command rpmbuild for building instead of plain rpm.
Finally, if you have downloaded .tar.gz packages, first compile and install milteroo:
% tar xvzf milteroo-0.1.tar.gz % cd milteroo-0.1 % ./configure % make % make install
and then chainmail proper:
% tar xvzf chainmail-0.3.tar.gz % cd chainmail-0.3 % ./configure % make % make install