수상한 메일로그..

아래와 같이 계속적으로 autodesk@xxxx 가 자기자신에게 메일을 발송합니다.

제가 이 계정을 웹메일발송용 계정으로 사용중입니다.

그런데 아래와같은 메일을 발송한적이 없거든요,,

relay로 사용되고 있는건가요?? 

자꾸 스팸메일로 등록이되어 확인해보니 아래와같이 계속 중복되어 발송됩니다.

발송 서버도 저희쪽 웹 서버가 아닙니다.

조언 부탁드립니다.

Nov 16 10:07:23 dbridge sendmail[23255]: kAG17Jnp023255: from=<autodesk@autodeskclub.co.kr>, size=19323, class=0, nrcpts=1, msgid=<000901c70885$1d40d850$0618aa3c@reygghldh>, proto=ESMTP, daemon=MTA, relay=20151089252.user.veloxzone.com.br [201.51.89.252]
Nov 16 10:07:24 dbridge sendmail[23257]: kAG17Jnp023255: to=<autodesk@autodeskclub.co.kr>, ctladdr=<autodesk@autodeskclub.co.kr> (533/5002), delay=00:00:03, xdelay=00:00:01, mailer=local, pri=49567, dsn=2.0.0, stat=Sent

Nov 16 14:21:07 dbridge sendmail[24460]: kAG5Ktnp024460: from=<autodesk@autodeskclub.co.kr>, size=16224, class=0, nrcpts=1, msgid=<000a01c7093e$f81de6c0$010faa3c@dbetutnnogbex>, proto=ESMTP, daemon=MTA, relay=221-134-228-92.sify.net [221.134.228.92] (may be forged)
Nov 16 14:21:08 dbridge sendmail[24461]: kAG5Ktnp024460: to=<autodesk@autodeskclub.co.kr>, ctladdr=<autodesk@autodeskclub.co.kr> (533/5002), delay=00:00:08, xdelay=00:00:01, mailer=local, pri=46465, dsn=2.0.0, stat=Sent

Nov 16 15:36:19 dbridge sendmail[24855]: kAG6aGnp024855: from=<autodesk@autodeskclub.co.kr>, size=15541, class=0, nrcpts=1, msgid=<000a01c70984$3339fd80$017eaa3c@flmgyuvl>, proto=ESMTP, daemon=MTA, relay=localhost [222.253.15.168] (may be forged)
Nov 16 15:36:20 dbridge sendmail[24856]: kAG6aGnp024855: to=<autodesk@autodeskclub.co.kr>, ctladdr=<autodesk@autodeskclub.co.kr> (533/5002), delay=00:00:03, xdelay=00:00:01, mailer=local, pri=45754, dsn=2.0.0, stat=Sent

Nov 16 17:34:10 dbridge sendmail[25506]: kAG8Y9np025506: from=<autodesk@autodeskclub.co.kr>, size=17039, class=0, nrcpts=1, msgid=<000901c70959$f5ced260$01c2aa3c@xeoqwpygc>, proto=ESMTP, daemon=MTA, relay=[61.19.31.42]
Nov 16 17:34:15 dbridge sendmail[25507]: kAG8Y9np025506: to=<autodesk@autodeskclub.co.kr>, ctladdr=<autodesk@autodeskclub.co.kr> (533/5002), delay=00:00:06, xdelay=00:00:05, mailer=local, pri=47225, dsn=2.0.0, stat=Sent

Nov 16 18:48:11 dbridge sendmail[25976]: kAG9m7np025976: from=<autodesk@autodeskclub.co.kr>, size=16678, class=0, nrcpts=1, msgid=<000901c70964$4d152740$02d0aa3c@jxyrqpxop>, proto=ESMTP, daemon=MTA, relay=[88.240.22.176]
Nov 16 18:48:12 dbridge sendmail[25977]: kAG9m7np025976: to=<autodesk@autodeskclub.co.kr>, ctladdr=<autodesk@autodeskclub.co.kr> (533/5002), delay=00:00:03, xdelay=00:00:01, mailer=local, pri=46868, dsn=2.0.0, stat=Sent

Nov 16 21:04:16 dbridge sendmail[26281]: kAGC49np026281: from=<autodesk@autodeskclub.co.kr>, size=16729, class=0, nrcpts=1, msgid=<000a01c70977$4b385650$016caa3c@fjhhyovfprbgs>, proto=ESMTP, daemon=MTA, relay=61.17.181.146.static.vsnl.net.in [61.17.181.146] (may be forged)
Nov 16 21:04:16 dbridge sendmail[26282]: kAGC49np026281: to=<autodesk@autodeskclub.co.kr>, ctladdr=<autodesk@autodeskclub.co.kr> (533/5002), delay=00:00:05, xdelay=00:00:00, mailer=local, pri=46987, dsn=2.0.0, stat=Sent

Nov 16 01:27:51 dbridge sendmail[21934]: kAFGRinp021934: from=<autodesk@autodeskclub.co.kr>, size=25281, class=0, nrcpts=1, msgid=<000901c708d3$6a3ad270$011daa3c@dhaqwsaprgk>, proto=ESMTP, daemon=MTA, relay=let018.cem.itesm.mx [148.241.81.18] (may be forged)
Nov 16 01:27:53 dbridge sendmail[21935]: kAFGRinp021934: to=<autodesk@autodeskclub.co.kr>, ctladdr=<autodesk@autodeskclub.co.kr> (533/5002), delay=00:00:09, xdelay=00:00:02, mailer=local, pri=55513, dsn=2.0.0, stat=Sent

Nov 16 04:10:37 dbridge sendmail[22415]: kAFJAZnp022415: from=<autodesk@autodeskclub.co.kr>, size=18596, class=0, nrcpts=1, msgid=<000901c708e9$bcaac9a0$02a5aa3c@fflgfjiekxpl>, proto=ESMTP, daemon=MTA, relay=user-142gfo6.cable.mindspring.com [72.40.63.6]
Nov 16 04:10:38 dbridge sendmail[22416]: kAFJAZnp022415: to=<autodesk@autodeskclub.co.kr>, ctladdr=<autodesk@autodeskclub.co.kr> (533/5002), delay=00:00:03, xdelay=00:00:01, mailer=local, pri=48837, dsn=2.0.0, stat=Sent