sendmail이 되질않네요...

안녕하세요. 센드메일이 안되어서 이렇게 질문드립니다.
smtp를 열었는지 확인하기위해 텔넷으로 접속을 했습니다.

[root@localhost mail]# telnet localhost smtp

Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 localhost.localdomain ESMTP Sendmail 8.13.2/8.12.8; Thu, 23 Dec 2004 17:03:36 +0900

500 5.5.1 Command unrecognized: ""
^]
telnet> quit
Connection closed.
[root@localhost mail]#

smtp는 제대로 되는거 맞죠...?

그래서 루트로 메일을 전송해봤더니

[root@localhost mail]# mail -v i3cfire@nate.com
Subject: hi
hellow
Cc:
i3cfire@nate.com... Connecting to [127.0.0.1] via relay...
220 localhost.localdomain ESMTP Sendmail 8.13.2/8.12.8; Thu, 23 Dec 2004 17:14:13 +0900
>>> EHLO localhost.localdomain
250-localhost.localdomain Hello localhost.localdomain [127.0.0.1], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-DELIVERBY
250 HELP
>>> MAIL From:<root@localhost.localdomain> SIZE=41
250 2.1.0 <root@localhost.localdomain>... Sender ok
>>> RCPT To:<i3cfire@nate.com>
>>> DATA
250 2.1.5 <i3cfire@nate.com>... Recipient ok
354 Enter mail, end with "." on a line by itself
>>> .
250 2.0.0 iBN8EDbG002407 Message accepted for delivery
i3cfire@nate.com... Sent (iBN8EDbG002407 Message accepted for delivery)
Closing connection to [127.0.0.1]
>>> QUIT
221 2.0.0 localhost.localdomain closing connection
[root@localhost mail]#

저렇게 뜨고 네이트로그인해서 확인해보면 메일이 없습니다...

php에서 mail함수로 메일을 보내봐도 안되는건 여전히;;
뭐가 잘못되었을까요..?

ps.
mail -v root 하니깐 루트로는 메일이 보내지는군요;;