This is the default example configuration of dynamicmaps.cf provided by Postfix. This config file was generated by Postfix running on Ubuntu 14.04.
It is located under: /etc/postfix/dynamicmaps.cf
# Postfix dynamic maps configuration file.
#
#type location of .so file open function (mkmap func)
#==== ================================ ============= ============
tcp /usr/lib/postfix/dict_tcp.so dict_tcp_open
sqlite /usr/lib/postfix/dict_sqlite.so dict_sqlite_open
Download the raw file with wget or curl
wget -O dynamicmaps.cf.example http://exampleconfig.com/static/raw/postfix/ubuntu14.04/etc/postfix/dynamicmaps.cf
curl http://exampleconfig.com/static/raw/postfix/ubuntu14.04/etc/postfix/dynamicmaps.cf > dynamicmaps.cf.example
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