메일서버.. 보내기 안되여

어느 순간부터 메일이 보내지지 않습니다.

가입축하메일등.. 웹에서 sandmail로 보내는데여..

예전에 보냈는데 어느 순간부터 안되고 있습니다.

로그 올려봅니다. 해결방안좀 .. 부탁드리겠습니다.

size=921, class=0, nrcpts=1, msgid=<200901191802.n0JI21tg019969@domain.or.kr>, proto=ESMTP, daemon=MTA, relay=hs [127.0.0.1]
Jan 20 03:02:01 local sendmail[19969]: n0JI21tg019969: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30682, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (n0JI21l5019973 Message accepted for delivery)
Jan 20 03:02:01 local sendmail[19974]: n0JI21l5019973: to=<root@domain.or.kr>, ctladdr=<root@domain.or.kr> (0/0), delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31103, dsn=2.0.0, stat=Sent
Jan 20 04:02:03 local sendmail[20335]: n0JJ23si020335: from=root, size=1126, class=0, nrcpts=1, msgid=<200901191902.n0JJ23si020335@domain.or.kr>, relay=root@localhost
Jan 20 04:02:04 local sendmail[20008]: n0JJ21jA020008: from=root, size=5885, class=0, nrcpts=1, msgid=<200901191902.n0JJ21jA020008@domain.or.kr>, relay=root@localhost
Jan 20 04:02:08 local sendmail[20339]: n0JJ23ch020339: from=<root@domain.or.kr>, size=1392, class=0, nrcpts=1, msgid=<200901191902.n0JJ23si020335@domain.or.kr>, proto=ESMTP, daemon=MTA, relay=hs [127.0.0.1]
Jan 20 04:02:08 local sendmail[20335]: n0JJ23si020335: to=root, ctladdr=root (0/0), delay=00:00:05, xdelay=00:00:05, mailer=relay, pri=31126, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (n0JJ23ch020339 Message accepted for delivery)
Jan 20 04:02:08 local sendmail[20365]: n0JJ23ch020339: to=<root@domain.or.kr>, ctladdr=<root@domain.or.kr> (0/0), delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31580, dsn=2.0.0, stat=Sent
Jan 20 04:02:09 local sendmail[20364]: n0JJ24rj020364: from=<root@domain.or.kr>, size=6124, class=0, nrcpts=1, msgid=<200901191902.n0JJ21jA020008@domain.or.kr>, proto=ESMTP, daemon=MTA, relay=hs [127.0.0.1]
Jan 20 04:02:09 local sendmail[20008]: n0JJ21jA020008: to=root, ctladdr=root (0/0), delay=00:00:08, xdelay=00:00:05, mailer=relay, pri=35885, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (n0JJ24rj020364 Message accepted for delivery)
Jan 20 04:02:09 local sendmail[21690]: n0JJ24rj020364: to=<root@domain.or.kr>, ctladdr=<root@domain.or.kr> (0/0), delay=00:00:00, xdelay=00:00:00, mailer=local, pri=36306, dsn=2.0.0, stat=Sent
Jan 20 10:14:13 local sendmail[22165]: n0K1EDqd022165: from=nobody, size=2285, class=0, nrcpts=1, msgid=<200901200114.n0K1EDqd022165@domain.or.kr>, relay=nobody@localhost
Jan 20 10:14:13 local sendmail[22168]: n0K1EDcI022168: from=<nobody@domain.or.kr>, size=2502, class=0, nrcpts=1, msgid=<200901200114.n0K1EDqd022165@domain.or.kr>, proto=ESMTP, daemon=MTA, relay=hs [127.0.0.1]
Jan 20 10:14:13 local sendmail[22165]: n0K1EDqd022165: to=xxxxxx@naver.com, ctladdr=nobody (99/99), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=32285, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (n0K1EDcI022168 Message accepted for delivery)
Jan 20 10:18:04 local sendmail[22170]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=00:03:51, xdelay=00:03:51, mailer=esmtp, pri=122502, relay=rcvmail9.naver.com. [220.95.237.143], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail9.naver.com.
Jan 20 10:48:31 local sendmail[22224]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=00:34:18, xdelay=00:03:51, mailer=esmtp, pri=212502, relay=rcvmail5.naver.com. [211.218.150.164], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail5.naver.com.
an 20 14:48:31 local sendmail[22408]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=04:34:18, xdelay=00:03:51, mailer=esmtp, pri=572502, relay=rcvmail5.naver.com. [211.218.150.164], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail5.naver.com.
Jan 20 14:48:31 local sendmail[22408]: n0K1EDcI022168: n0K5iecJ022408: sender notify: Warning: could not send message for past 4 hours
Jan 20 14:48:31 local sendmail[22408]: n0K5iecJ022408: to=root, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=33715, dsn=2.0.0, stat=Sent
Jan 20 15:48:31 local sendmail[22456]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=05:34:18, xdelay=00:03:51, mailer=esmtp, pri=662502, relay=rcvmail9.naver.com. [220.95.237.143], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail9.naver.com.
Jan 20 16:48:31 local sendmail[22507]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=06:34:18, xdelay=00:03:51, mailer=esmtp, pri=752502, relay=rcvmail1.naver.com. [211.218.150.166], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail1.naver.com.
Jan 20 17:48:31 local sendmail[22593]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=07:34:18, xdelay=00:03:51, mailer=esmtp, pri=842502, relay=rcvmail9.naver.com. [220.95.237.143], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail9.naver.com.
an 20 23:48:31 local sendmail[22855]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=13:34:18, xdelay=00:03:51, mailer=esmtp, pri=1382502, relay=rcvmail1.naver.com. [211.218.150.166], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail1.naver.com.
Jan 21 00:48:31 local sendmail[22875]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=14:34:18, xdelay=00:03:51, mailer=esmtp, pri=1472502, relay=rcvmail10.naver.com. [220.95.237.142], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail10.naver.com.
Jan 21 01:48:31 local sendmail[22906]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=15:34:18, xdelay=00:03:51, mailer=esmtp, pri=1562502, relay=rcvmail1.naver.com. [211.218.150.166], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail1.naver.com.
Jan 21 02:48:31 local sendmail[22938]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=16:34:18, xdelay=00:03:51, mailer=esmtp, pri=1652502, relay=rcvmail2.naver.com. [220.73.146.164], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail2.naver.com.
Jan 21 03:02:01 local sendmail[22959]: n0KI21EF022959: from=root, size=682, class=0, nrcpts=1, msgid=<200901201802.n0KI21EF022959@domain.or.kr>, relay=root@localhost
Jan 21 03:02:01 local sendmail[22963]: n0KI211Y022963: from=<root@domain.or.kr>, size=921, class=0, nrcpts=1, msgid=<200901201802.n0KI21EF022959@domain.or.kr>, proto=ESMTP, daemon=MTA, relay=hs [127.0.0.1]
Jan 21 03:02:01 local sendmail[22959]: n0KI21EF022959: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30682, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (n0KI211Y022963 Message accepted for delivery)
Jan 21 03:02:01 local sendmail[22964]: n0KI211Y022963: to=<root@domain.or.kr>, ctladdr=<root@domain.or.kr> (0/0), delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31103, dsn=2.0.0, stat=Sent
Jan 21 03:48:31 local sendmail[22983]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=17:34:18, xdelay=00:03:51, mailer=esmtp, pri=1742502, relay=rcvmail12.naver.com. [211.218.150.121], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail12.naver.com.
Jan 21 04:02:02 local sendmail[23321]: n0KJ22Ho023321: from=root, size=1161, class=0, nrcpts=1, msgid=<200901201902.n0KJ22Ho023321@domain.or.kr>, relay=root@localhost
Jan 21 04:02:02 local sendmail[23325]: n0KJ227I023325: from=<root@domain.or.kr>, size=1427, class=0, nrcpts=1, msgid=<200901201902.n0KJ22Ho023321@domain.or.kr>, proto=ESMTP, daemon=MTA, relay=hs [127.0.0.1]
Jan 21 04:02:02 local sendmail[23321]: n0KJ22Ho023321: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31161, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (n0KJ227I023325 Message accepted for delivery)
Jan 21 04:02:02 local sendmail[23326]: n0KJ227I023325: to=<root@domain.or.kr>, ctladdr=<root@domain.or.kr> (0/0), delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31615, dsn=2.0.0, stat=Sent
Jan 21 04:02:04 local sendmail[22994]: n0KJ21l5022994: from=root, size=5885, class=0, nrcpts=1, msgid=<200901201902.n0KJ21l5022994@domain.or.kr>, relay=root@localhost
Jan 21 04:02:04 local sendmail[23451]: n0KJ24aH023451: from=<root@domain.or.kr>, size=6124, class=0, nrcpts=1, msgid=<200901201902.n0KJ21l5022994@domain.or.kr>, proto=ESMTP, daemon=MTA, relay=hs [127.0.0.1]
Jan 21 04:02:04 local sendmail[22994]: n0KJ21l5022994: to=root, ctladdr=root (0/0), delay=00:00:03, xdelay=00:00:00, mailer=relay, pri=35885, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (n0KJ24aH023451 Message accepted for delivery)
Jan 21 04:02:04 local sendmail[23452]: n0KJ24aH023451: to=<root@domain.or.kr>, ctladdr=<root@domain.or.kr> (0/0), delay=00:00:00, xdelay=00:00:00, mailer=local, pri=36306, dsn=2.0.0, stat=Sent
Jan 21 04:48:31 local sendmail[23503]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=18:34:18, xdelay=00:03:51, mailer=esmtp, pri=1832502, relay=rcvmail4.naver.com. [220.73.146.166], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail4.naver.com.
Jan 21 10:48:31 local sendmail[23932]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=1+00:34:18, xdelay=00:03:51, mailer=esmtp, pri=2372502, relay=rcvmail10.naver.com. [220.95.237.142], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail10.naver.com.
Jan 21 11:48:31 local sendmail[24001]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=1+01:34:18, xdelay=00:03:51, mailer=esmtp, pri=2462502, relay=rcvmail5.naver.com. [211.218.150.164], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail5.naver.com.
Jan 21 12:48:31 local sendmail[24062]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=1+02:34:18, xdelay=00:03:51, mailer=esmtp, pri=2552502, relay=rcvmail3.naver.com. [220.73.146.165], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail3.naver.com.
Jan 21 13:30:04 local sendmail[24255]: n0L4S670024255: from=root, size=2, class=0, nrcpts=1, relay=root@localhost
Jan 21 13:48:31 local sendmail[24309]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=1+03:34:18, xdelay=00:03:51, mailer=esmtp, pri=2642502, relay=rcvmail6.naver.com. [211.218.150.34], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail6.naver.com.
Jan 21 16:48:31 local sendmail[25021]: n0K1EDcI022168: to=<xxxxxx@naver.com>, ctladdr=<nobody@domain.or.kr> (99/99), delay=1+06:34:18, xdelay=00:03:51, mailer=esmtp, pri=2912502, relay=rcvmail12.naver.com. [211.218.150.121], dsn=4.0.0, stat=Deferred: Connection timed out with rcvmail12.naver.com.