dovecot - Sep 2018 - Fatal: Support not compiled in for passdb driver 'pam'

Hi Guys,

Can anyone help me, I'm having trouble halting caching authentication for
the PAM module.

I follow this procedure: https://wiki.dovecot.org/PasswordDatabase/PAM


I got this error

Sep 20 10:05:58 pop3-login: Info: Disconnected: Auth process broken
(disconnected before auth was ready, waited 0 secs): user=<>, rip=, lip=,
session=<QmW2BU52TACsFBTt>

Sep 20 10:06:00 auth: Fatal: Support not compiled in for passdb driver
'pam'

Sep 20 10:06:00 master: Error: service(auth): command startup failed,
throttling for 4 secs
Sep 20 10:06:00 auth: Fatal: Support not compiled in for passdb driver
'pam'


dovecot -n
# 2.2.4: /usr/local/etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-754.3.5.el6.x86_64 x86_64 CentOS release 6.10 (Final)
ext4
auth_cache_negative_ttl = 1 days
auth_cache_size = 10 M
auth_cache_ttl = 1 days
auth_verbose = yes
disable_plaintext_auth = no
instance_name = Mail Popper 1
listen = 172.20.20.222
login_greeting = Mail Popper 1 Ready
mail_location = mbox:/var/empty:INBOX=/var/mail/%u:INDEX=MEMORY
mail_privileged_group = mail
namespace inbox {
  inbox = yes
  location   mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix }
passdb {
  args = session=yes cache_key=%n dovecot
  driver = pam
}
passdb {
  driver = shadow
}
protocols = pop3
ssl = no
userdb {
  args = blocking=yes
  driver = passwd
}
protocol pop3 {
  pop3_uidl_format = %08Xu%08Xv
}

Thank you
-- 
Evandro
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