This is the default example configuration of dynamicmaps.cf provided by Postfix. This config file was generated by Postfix running on Ubuntu 16.04.
It is located under: /etc/postfix/dynamicmaps.cf
# dict-type so-name (pathname) dict-function mkmap-function
sqlite postfix-sqlite.so.1.0.1 dict_sqlite_open
Download the raw file with wget or curl
wget -O dynamicmaps.cf.example http://exampleconfig.com/static/raw/postfix/ubuntu16.04/etc/postfix/dynamicmaps.cf
curl http://exampleconfig.com/static/raw/postfix/ubuntu16.04/etc/postfix/dynamicmaps.cf > dynamicmaps.cf.example
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