installation by prebuilt binaries creates security contexts on each file (as shown here https://linux.die.net/man/8/dovecot_selinux) so that dovecot integrates perfectly in SELinux.
I've compiled instead from sources (as described here https://wiki2.dovecot.org/CompilingSource) and i'd like to know how create same security contexts of prebuilt binaries to have an identical behaviour in SELinux.