This is the default example configuration of cdb provided by Postfix. This config file was generated by Postfix running on CentOS 8.
It is located under: /etc/postfix/dynamicmaps.cf.d/cdb
cdb /usr/lib64/postfix/postfix-cdb.so dict_cdb_open mkmap_cdb_open
Download the raw file with wget or curl
wget -O cdb.example http://exampleconfig.com/static/raw/postfix/centos8/etc/postfix/dynamicmaps.cf.d/cdb
curl http://exampleconfig.com/static/raw/postfix/centos8/etc/postfix/dynamicmaps.cf.d/cdb > cdb.example
Other config files you might find useful
