If the fetmailrc is empty or only the poll strings are in it without any "set" configuration the fetcmailrc is not regnerated by univention-directory-listener-ctrl resync fetchmailrc Also when adding a fetchmail single drop account, the entire fetchmailrc is overwritten. Only the just created user gets a poll line dpkg -l | grep fetchmail ii fetchmail 6.4.0~beta4-3+deb10u1A~5.0.0.202104091504 amd64 SSL enabled POP3, APOP, IMAP mail gatherer/forwarder ii univention-fetchmail 13.0.8-2 all UCS fetchmail integration for UDM ii univention-fetchmail-schema 13.0.8-2 all UCS schema package for univention-fetchmail I could reproduce it with UCS 5.0-9