The following configuration file specifies that all Mailutils programs should use /var/spool/mail as a local mailspool directory. Programs performing authentication will use pam service mailutils. All programs, except imap4d will issue log messages via mail facility, imap4d will use facility local1.
:mailbox --mail-spool /var/spool/mail :auth --authentication pam --pam-service mailutils :logging --log-facility mail imap4d --daemon=20 --timeout=1800 --log-facility local1