smtp认证问题

jxgzoyke

[root@rh9 mail]# telnet 192.168.1.201 25
Trying 192.168.1.201...
Connected to 192.168.1.201.
Escape character is '^]'.
220 localhost.localdomain ESMTP Sendmail 8.12.8/8.12.8; Thu, 14 Apr 2005 08:35:43 +0800
ehlo test
250-localhost.localdomain Hello mail.gz1014.com [192.168.1.201], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-DELIVERBY
250 HELP

在網上看了一些貼子,測試一下可以沒有看到以下那一行,是不是就不能用smtp認證啊,那如果要用的話要怎麼啟用呢
250-AUTH DIGEST-MD5 CRAM-MD5 LOGIN PLAIN