메일 발송시 에러가

메일을 발송하면 아래와 같은 로그가 남으면서 발송이 안되고 있습니다.

잘되던거 설정 견드려서 이리 만들었네요..ㅠㅠ

뭘 건드려서 저렇게 된건지 알수가 없으니 답답하네요.

Sep 20 16:11:50 testmode sendmail[22956]: j8K7Bn07022956: from=root, size=58, class=0, nrcpts=1, msgid=<200509200711.j8K7Bn07022956@testmode.com>, relay=root@localhost
Sep 20 16:11:50 testmode sendmail[22958]: j8K7BoOa022958: ruleset=check_rcpt, arg1=<testman@gmail.com>, relay=localhost.localdomain [127.0.0.1], reject=553 5.0.0 <testman@gmail.com>... User address required
Sep 20 16:11:50 testmode sendmail[22956]: j8K7Bn07022956: to=testman@gmail.com, ctladdr=root (0/0), delay=00:00:01, xdelay=00:00:00, mailer=relay, pri=30058, relay=[127.0.0.1] [127.0.0.1], dsn=5.0.0, stat=User unknown
Sep 20 16:11:50 testmode sendmail[22958]: j8K7BoOa022958: from=<root@testmode.com>, size=58, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 20 16:11:50 testmode sendmail[22956]: j8K7Bn07022956: j8K7Bn08022956: DSN: User unknown
Sep 20 16:11:50 testmode sendmail[22958]: j8K7BoOc022958: ruleset=check_rcpt, arg1=<root@testmode.com>, relay=localhost.localdomain [127.0.0.1], reject=553 5.0.0 <root@testmode.com>... User address required
Sep 20 16:11:50 testmode sendmail[22956]: j8K7Bn08022956: to=root, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31082, relay=[127.0.0.1] [127.0.0.1], dsn=5.0.0, stat=User unknown
Sep 20 16:11:50 testmode sendmail[22958]: j8K7BoOc022958: from=<>, size=1082, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 20 16:11:50 testmode sendmail[22956]: j8K7Bn08022956: j8K7Bn09022956: return to sender: User unknown
Sep 20 16:11:50 testmode sendmail[22958]: j8K7BoOe022958: ruleset=check_rcpt, arg1=<postmaster@testmode.com>, relay=localhost.localdomain [127.0.0.1], reject=553 5.0.0 <postmaster@testmode.com>... User address required
Sep 20 16:11:50 testmode sendmail[22956]: j8K7Bn09022956: to=postmaster, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=32106, relay=[127.0.0.1] [127.0.0.1], dsn=5.0.0, stat=User unknown
Sep 20 16:11:50 testmode sendmail[22958]: j8K7BoOe022958: from=<>, size=2106, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
Sep 20 16:11:50 testmode sendmail[22956]: j8K7Bn08022956: Losing ./qfj8K7Bn08022956: savemail panic
Sep 20 16:11:50 testmode sendmail[22956]: j8K7Bn08022956: SYSERR(root): savemail: cannot save rejected email anywhere

해당 로그이요 보니까 dns에 user unkown 이라고 나오는데 이거때문인지..

메일 관련해서 초기 설정한 값 빼고는 수정한게 없는데 왜 저리 나오는지..