sendmail error? 도와 주게염!!

: : SENDMAIL
: :
: : version 8.12.2-8
: :
: :
: : # vi access
: :
: : # Check the /usr/share/doc/sendmail/README.cf file for a description
: : # of the format of this file. (search for access_db in that file)
: : # The /usr/share/doc/sendmail/README.cf is part of the sendmail-doc
: : # package.
: : #
: : # by default we allow relaying from localhost...
: : localhost.localdomain           RELAY
: : localhost                       RELAY
: : 127.0.0.1                       RELAY
: : xxxxxxx.com                     RELAY
: : xxx.xxx.x                       RELAY
: :
: :
: :
: : # vi local-host-names
: : # local-host-names - include all aliases for your machine here.
: : xxxxxx.co.kr
: : mail.xxxxxx.co.kr
: :
: : 위와 같이 설정되어 있고
: :
: : # makemap hash /etc/mail/access.db < /etc/mail/access
: :
: : 위의 명령으로 db를 생성하였고 sendmail을 재시작하였습니다.
: : sendmail.cf에서
: : # anything else is bogus
: : ##R$*                   $#error $@ 5.7.1 $: "550 Relaying denied"
: :
: : Cwmail.xxxxxx.com
: : 으로 설정했습니다.
: :
: :
: : test...!!
: :
: : # telnet xxxxx.xxx 110
: : Trying xxx.xx.xxx.x...
: : Connected to xxxxxx.co.kr (xxx.xxx.xxx.xxx).
: : Escape character is '^]'.
: : +OK POP3 xxxxxxx.xxx v2002.78rh server ready
: : user ung
: : +OK User name accepted, password please
: : pass ung
: : +OK Mailbox open, 0 messages
: : quit
: : +OK Sayonara
: : Connection closed by foreign host.
: :
: : # telnet xxxxxx.xxx 25
: : Trying 127.0.0.1...
: : Connected to xxxxxx.xxx (127.0.0.1).
: : Escape character is '^]'.
: : 220 xxxxxx.xxxESMTP Sendmail 8.12.2/8.12.2; Fri, 5 Apr 2002 18:22:44 +0900
: : quit
: : 221 2.0.0 xxxxxx.com closing connection
: : Connection closed by foreign host.

test는 성공한것 같은데 out loolexpress에서 계정을 주고 실행시키면 아래와 같이 오류 메시지..가
오류메시지 (outlookexpress에서)
서버에 연결할 수 없습니다(계정: 'mail.xxxxxx.com','POP3 서버: mail.xxxxxx.com',
오류번호: 0x800ccc0e)
오류메시지가 나옵니다....
제발 해결 방법좀 알려주세염