sendmail 认证问题

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我的sendmail ，用out look 连接后，只有系统用户能向外发邮件，用saslpasswd 增加的用户却发不了，外面的也可以给系统用户发邮件，但用 outlook 却收不了，用非系统用户发邮件，一直提示输入用户名，密码。。。不知道是怎么回事？


不知道是哪里认证有问题，/etc/sendmai.mc中的相关项已经改过了，如下：

TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')

dnl # The following causes sendmail to only listen on the IPv4 loopback address
dnl # 127.0.0.1 and not on any other network devices. Remove the loopback
dnl # address restriction to accept email from the internet or intranet.
dnl #
    DAEMON_OPTIONS(`Port=smtp,Name=MTA')dnl

dnl # We strongly recommend not accepting unresolvable domains if you want to
dnl # protect yourself from spam. However, the laptop and users on computers
dnl # that do not have 24x7 DNS do need this.
dnl #
dnl FEATURE(`accept_unresolvable_domains')dnl

dnl # Also accept email sent to "localhost.localdomain" as local email.
dnl #
LOCAL_DOMAIN(`localhost.localdomain')dnl


gnu/linux 系统 ，sendmail-8.13.1-2，cyrus-sasl-2.1.19-5.EL4，imap-2001a-18。

telnet localhost 25 会输出一下内容
Hello localhost.localdomain [127.0.0.1], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-AUTH GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN
250-DELIVERBY
250 HELP


telnet localhost 110 输出一下内容
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
+OK POP3 localhost.localdomain v2001.78rh server ready


sendmail -d0.1 -bv root 输出一下内容
Version 8.13.1
Compiled with: DNSMAP HESIOD HES_GETMAILHOST LDAPMAP LOG MAP_REGEX
     MATCHGECOS MILTER MIME7TO8 MIME8TO7 NAMED_BIND NETINET NETINET6
     NETUNIX NEWDB NIS PIPELINING SASLv2 SCANF STARTTLS TCPWRAPPERS
     USERDB USE_LDAP_INIT


用 outlook 收信的时候，看maillog 里面的日志有这样的：
pop3 service init from 61.237.235.2
Command stream end of file while reading line user=mytest@domain.com  host=[61.237.235.2]

并一直提示输入用户名，密码

系统用户给系统用户可以发邮件，在服务器上能看到邮件方在了对应的用户名下
，但系统用户不能给 用 Saslpasswd 增加的用户发邮件，日志中提示 User unknown
，另外非系统用户不能向外面发邮件，总是提示输入用户名，密码 并在日志中提示：

[61.237.235.2] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA


请大侠指点，跪谢了。。。