anchor.diff:  #
   # For best results, change no more than 2-3 parameters at a time,
   # and test if Postfix still works after every change.
  +
  +# COMPATIBILITY
  +#
  +# The compatibility_level determines what default settings Postfix
  +# will use for main.cf and master.cf settings. These defaults will
  +# change over time.
  +#
  +# To avoid breaking things, Postfix will use backwards-compatible
  +# default settings and log where it uses those old backwards-compatible
  +# default settings, until the system administrator has determined
  +# if any backwards-compatible default settings need to be made
  +# permanent in main.cf or master.cf.
  +#
  +# When this review is complete, update the compatibility_level setting
  +# below as recommended in the RELEASE_NOTES file.
  +#
  +# The level below is what should be used with new (not upgrade) installs.
  +#
  +compatibility_level = 2
   
   # SOFT BOUNCE
   #
  
positive.code: # daemon programs (i.e. programs listed in the master.cf file). This
  # directory must be owned by root.
  #
  daemon_directory = /usr/lib/postfix
  
  # The data_directory parameter specifies the location of Postfix-writable
  # data files (caches, random numbers). This directory must be owned
  
negative.code: # sample_directory: The location of the Postfix sample configuration files.
  # This parameter is obsolete as of Postfix 2.1.
  #
  sample_directory = /etc/postfix
  
  # readme_directory: The location of the Postfix README files.
  #
  readme_directory = /usr/share/doc/postfix
  inet_protocols = ipv4
  meta_directory = /etc/postfix
  shlib_directory = /usr/lib/postfix
  
  smtp_sasl_auth_enable = yes
  smtp_sasl_security_options = noanonymous
  