Hi UFHH01,
so with dovecot, if I want to include some directory I must use "!" ?
Because in all other services like nginx, proftpd, postfix, etc the command "include" is not preceded by "!"
Not all configurations, commands, strings, options, ... can be transferred to every existent linux software package, or can be used as example(s) for other linux software packages. The manual pages and official documentations for each software package will inform you about the ( possible specific / unique ) ways to configure the software.