Error: command ['/usr/sbin/dovecot', '-n'] failed with exit code 89: # 2.0.19: /etc/dovecot/dovecot.conf
doveconf: Warning: NOTE: You can get a new clean config file with: doveconf -n > dovecot-new.conf
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:721: protocol managesieve {} has been replaced by protocol sieve { }
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:889: add auth_ prefix to all settings inside auth {} and remove the auth {} section completely
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:927: passdb pam {} has been replaced by passdb { driver=pam }
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:1040: userdb passwd {} has been replaced by userdb { driver=passwd }
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:1102: auth_user has been replaced by service auth { user }
# OS: Linux 2.6.32-40-server x86_64 Ubuntu 12.04.1 LTS ext4
disable_plaintext_auth = no
log_timestamp = "%Y-%m-%d %H:%M:%S "
mail_location = mbox:/var/imap/%u:INBOX=/var/mail/%u
mail_privileged_group = mail
passdb {
  driver = pam
}
protocols = pop3
service auth {
  user = root
}
userdb {
  driver = passwd
}
doveconf: Error: ssl enabled, but ssl_cert not set
protocol pop3 {
  pop3_uidl_format = %08Xu%08Xv
}
doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf: ssl enabled, but ssl_cert not set