postfix cyrus-imapt linux邮件服务器

[xueshangusong]

1.通过postfix发邮件时，有这样的日志，如下：

Mar 12 20:15:17 localhost postfix/smtpd[18252]: connect from unknown[192.168.59.104]
Mar 12 20:15:17 localhost postfix/smtpd[18252]: 170F6E55A: client=unknown[192.168.59.104]
Mar 12 20:15:17 localhost postfix/cleanup[18257]: 170F6E55A: message-id=<>
Mar 12 20:15:17 localhost postfix/qmgr[18120]: 170F6E55A: from=<[e-mail]>, size=345, nrcpt=1 (queue active)
Mar 12 20:15:17 localhost postfix/smtpd[18252]: disconnect from unknown[192.168.59.104]
Mar 12 20:15:17 localhost lmtpunix[17968]: accepted connection
Mar 12 20:15:17 localhost lmtpunix[17968]: lmtp connection preauth'd as postman
Mar 12 20:15:17 localhost master[18260]: about to exec /usr/lib/cyrus-imapd/lmtpd
Mar 12 20:15:17 localhost lmtpunix[18260]: executed
Mar 12 20:15:17 localhost lmtpunix[17968]: IOERROR: fstating sieve script /var/lib/imap/sieve/c/cwp/defaultbc: No such file or directory
Mar 12 20:15:17 localhost lmtpunix[17968]: duplicate_check: <[e-mail]> user.cwp 0
Mar 12 20:15:17 localhost lmtpunix[17968]: duplicate_check: <[e-mail]> user.cwp 0
Mar 12 20:15:17 localhost lmtpunix[17968]: Delivered: <[e-mail]> to mailbox: user.cwp
Mar 12 20:15:17 localhost lmtpunix[17968]: mystore: starting txn 2147483651
Mar 12 20:15:17 localhost lmtpunix[17968]: mystore: committing txn 2147483651
Mar 12 20:15:17 localhost lmtpunix[17968]: duplicate_mark: <[e-mail]> user.cwp 1331597717 132
Mar 12 20:15:17 localhost postfix/lmtp[18259]: 170F6E55A: to=<[e-mail]>, relay=mail.e6000.com[/var/lib/imap/socket/lmtp], delay=0.22, delays=0.09/0.01/0.01/0.11, dsn=2.1.5, status=sent (250 2.1.5 Ok)
Mar 12 20:15:17 localhost postfix/qmgr[18120]: 170F6E55A: removed




2.通过SquirrelMail (web)登陆时提示如下，
ERROR
Unknown user or password incorrect.

服务端日志如下：
Mar 12 20:16:17 localhost master[17930]: process 17968 exited, status 0
Mar 12 20:16:27 localhost imap[17969]: accepted connection
Mar 12 20:16:27 localhost master[18265]: about to exec /usr/lib/cyrus-imapd/imapd
Mar 12 20:16:27 localhost imap[17969]: badlogin: localhost [::1] PLAIN [SASL(-16): encryption needed to use mechanism: security flags do not match required]
Mar 12 20:16:27 localhost imap[18265]: executed