Qmail can't varify user

[liu zhi]

Hello everyone After I installed Qmail on RedHat 6.2.I encountered follow problem.   1 On localhost: I type telnet localhost 25.and type "EHLO username" and Qmail suspent to reply.and I type "quit",but it doen't work,no response. [liuzhi@www liuzhi]$ telnet localhost 25 Trying 127.0.0.1... Connected to localhost.localdomain. Escape character is '^]'. EHLO liuzhi eixt quit quit quit quit 220 www3.imaginechina.com ESMTP 250-www3.imaginechina.com 250-PIPELINING 250 8BITMIME 502 unimplemented (#5.5.1) 502 unimplemented (#5.5.1) 221 www3.imaginechina.com Connection closed by foreign host. It seems that it was very slow.   2 On another machine: [liuzhi@WebServ liuzhi]$ telnet 90.0.0.100 25 Trying 90.0.0.100... Connected to 90.0.0.100. Escape character is '^]'. 220 www3.imaginechina.com ESMTP EHLO WebServ 250-www3.imaginechina.com 250-PIPELINING 250 8BITMIME MAIL FROM:liuzhi@[90.0.0.3] 250 ok RCPT TO:aaaaaaa@[90.0.0.100] 250 ok DATA 354 go ahead asdfasd . 250 ok 989996419 qp 9848 quit 221 www3.imaginechina.com Connection closed by foreign host. [liuzhi@WebServ liuzhi]$ telnet 90.0.0.100 25 Trying 90.0.0.100... Connected to 90.0.0.100. Escape character is '^]'. 220 www3.imaginechina.com ESMTP EHLO WebServ 250-www3.imaginechina.com 250-PIPELINING 250 8BITMIME Mail from:liuzhi@[90.0.0.3] 250 ok RCPT to:liuzhi@[90.0.0.100] 250 ok DATA 354 go ahead asdfasdf . 250 ok 989996500 qp 14789 quit 221 www3.imaginechina.com Connection closed by foreign host. PS:liuzhi is a real user.aaaaaaa is a false user on 90.0.0.100. It seems that the Qmail can't varify users on the system. Can you help me.Thanks a lot.