CentOS 5+Postfix 啟動 SASL2 的問題

[garychu]

環境：
CentOS 5
rpm安裝postfix
Cyrus-SASL2原本CentOS就有
帳號只有root

原先CentOS saslauthd是安裝在/var/run/saslauthd，已經將它停用，當執行/usr/sbin/saslauthd -a shadow檢驗sasl2是否成功一直出現Another instance of saslauthd is currently running，請問站上先進我的問題是哪邊沒有設定好應如何解決，謝謝。
http://phorum.study-area.org/index.p...msg197665.html

測試saslauthd的錯誤訊息
[xxx@xxx]# ./usr/sbin/testsaslauthd -u userID -p 'your.passwd'
0: NO "authentication failed"

檢驗sasl2是否成功的錯誤訊息
[xxx@xxx~]# /usr/sbin/saslauthd -a shadow
saslauthd[2719] :detach_tty : Cannot start saslauthd
saslauthd[2719] :detach_tty : Another instance of saslauthd is currently running

至/var/log/messages觀看的錯誤訊息：

saslauthd[2719] :detach_tty  : Cannot start saslauthd
saslauthd[2719] :detach_tty  : Another instance of saslauthd is currently running
saslauthd[2595]: detach_tty  : could not lock pid file /var/run/saslauthd/saslauthd.pid: Resource temporarily unavailable
saslauthd[2594]: detach_tty  : Cannot start saslauthd
saslauthd[2594]: detach_tty  : Another instance of saslauthd is currently running
saslauthd[2620]: main        : no authentication mechanism specified
saslauthd[2456]: server_exit : master exited: 2456
saslauthd[2633]: detach_tty  : master pid is: 2633
saslauthd[2633]: ipc_init    : listening on socket: /var/run/saslauthd/mux
saslauthd[2640]: detach_tty  : could not lock pid file /var/run/saslauthd/saslauthd.pid: Resource temporarily unavailable
saslauthd[2639]: detach_tty  : Cannot start saslauthd
saslauthd[2639]: detach_tty  : Another instance of saslauthd is currently running
saslauthd[2466]: do_auth     : auth failure: [user=userID] [service=imap] [realm=] [mech=pam] [reason=PAM auth error]

我的main.cf設定部份

# SASL
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = ' '
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, 
     check_relay_domains, reject_unauth_destination, 
     message_size_limit = 15728640, mailbox_size_limit = 500000000
smtpd_client_restrictions = permit_sasl_authenticated,
     check_client_access regexp:/etc/postfix/access
smtpd_sender_restrictions = reject_unknown_sender_domain
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname

/usr/lib/sasl2/smtpd.conf設定部份

pwcheck_method: saslauthd
mech_list: plain login

/etc/sysconfig/saslauthd設定部份

MECH=pam

不過我的CentOS 5裡面沒有/usr/sbin/pwcheck的執行檔
另外很怪的是，當停用saslauthd，執行ps aux檢查也確定沒有saslauthd在執行，但輸入/usr/sbin/saslauthd -a shadow仍發生相同錯誤訊息