A recurring message in one of our cyrus

[Andres Tarallo]

Hi!!!

I help to manage a network of mailservers spread all over the country.
We noticed that a recurring message appears in our logs

Jul 22 11:21:29 mail pop3[25381]: executed
Jul 22 11:21:29 mail pop3[25381]: IOERROR: opening
/var/lib/imap/user_deny.db: No such file or directory
Jul 22 11:21:29 mail pop3[25381]: accepted connection

We don't have a configured user_deny.db, nor have found were to
configure. Any help is appreciated.

Andrés