A DIRBOT is a PMDF channel, namely a SYNC_DIRBOT channel, and has to be configured in the PMDF configuration just like any other channel. This means adding a rewrite rule to the rules section of the PMDF configuration file, and adding a channel definition to the channel definition section.
If the SMTP host name of the system on which a DIRBOT is to run is acme.com, then the rewrite rule for the corresponding SYNC_DIRBOT channel could be:
dirsync.acme.com $U%dirsync.acme.com@DIRBOT-DAEMONand the matching channel definition would be
sync_dirbot_local single DIRBOT-DAEMONThis configuration means that mail addressed to dirbot@dirsync.acme.com (or indeed to anyuser@dirsync.acme.com) will be processed by the directory synchronization robot.