How to install python egg

I am trying to configure ftw.mail to install postfix. Since I'm new to Linux and Python, I really don't know if this is right, going in the right direction, or garbage.

From the official documentation, I found this:

• Add ftw.mail to your build config:
  [instance]
  eggs + =
  ftw.mail
  
• Set up a general profile for importing settings.

(source: https://github.com/4teamwork/ftw.mail/blob/master/README.rst )

My first question is "/ etc / postfix /" so called "build config"?

Second, I was struggling with how to build this "egg" which I tried:

$ wget https://bootstrap.pypa.io/ez_setup.py -O - | sudo python for ez_setup

      

        
        
        
      

    

then:

$ sudo apt-get install python-setuptools

      

        
        
        
      

    

and finish:

$ sudo easy_install ftw.mail

      

        
        
        
      

    

On the console, I was told the egg was there:

/usr/local/lib/python2.7/dist-packages/ftw.mail-2.3.1-py2.7.egg

I found it and I read that I needed to start it with:

$ PYTHONPATH=/usr/local/lib/python2.7/dist-packages/cssutils-1.0-py2.7.egg

      

        
        
        
      

    

which basically did nothing. Now the question arises: how to set the egg?

Summarizing my questions:

• Is "etc / postfix /" the build config directory I am looking for?
• How do I install the Python egg?
• And what should I do with: [instance] eggs + = ftw.mail?
• What is a generic settings import profile?