same msgid

[Amin, Harish]

I am having some duplicate messages problem on out list server

since Sunday we are having someone sending about 40 to 60 messages to entire
list containing several members

here's my Mailllog file
I noticed that all have same msgid=<se354441 , how is this possible
Thanx for any help

-----Original Message-----# grep mcda4-4-0-0-321.rback0.milw.wi.voyager.net
syslog* |more
syslog:Jan 27 14:41:51 badger sendmail[14858]: [ID 801593 mail.info]
h0RKfoI14858: from=<stanley.j.potts at uwrf.edu>, size=1603,
 class=-60, nrcpts=3, msgid=<se354441.015 at adngate.adn.uwrf.edu>,
proto=ESMTP, daemon=MTA-IPv4, relay=mcda4-4-0-0-321.rback0.mi
lw.wi.voyager.net [169.207.146.116] (may be forged)
syslog:Jan 27 14:43:52 badger sendmail[14934]: [ID 801593 mail.info]
h0RKhpI14934: from=<stanley.j.potts at uwrf.edu>, size=1624,
 class=-60, nrcpts=3, msgid=<se354441.015 at adngate.adn.uwrf.edu>,
proto=ESMTP, daemon=MTA-IPv4, relay=mcda4-4-0-0-321.rback0.mi
lw.wi.voyager.net [169.207.146.116] (may be forged)
syslog:Jan 27 14:45:57 badger sendmail[15016]: [ID 801593 mail.info]
h0RKjtI15016: from=<stanley.j.potts at uwrf.edu>, size=1645,
 class=-60, nrcpts=3, msgid=<se354441.015 at adngate.adn.uwrf.edu>,
proto=ESMTP, daemon=MTA-IPv4, relay=mcda4-4-0-0-321.rback0.mi
lw.wi.voyager.net [169.207.146.116] (may be forged)
syslog:Jan 27 14:47:52 badger sendmail[15108]: [ID 801593 mail.info]
h0RKlpI15108: from=<stanley.j.potts at uwrf.edu>, size=1666,
 class=-60, nrcpts=3, msgid=<se354441.015 at adngate.adn.uwrf.edu>,
proto=ESMTP, daemon=MTA-IPv4, relay=mcda4-4-0-0-321.rback0.mi
lw.wi.voyager.net [169.207.146.116] (may be forged)
syslog:Jan 27 14:49:54 badger sendmail[15206]: [ID 801593 mail.info]
h0RKnrI15206: from=<stanley.j.potts at uwrf.edu>, size=1687,
 class=-60, nrcpts=3, msgid=<se354441.015 at adngate.adn.uwrf.edu>,
proto=ESMTP, daemon=MTA-IPv4, relay=mcda4-4-0-0-321.rback0.mi
lw.wi.voyager.net [169.207.146.116] (may be forged)
syslog:Jan 27 14:51:50 badger sendmail[15289]: [ID 801593 mail.info]
h0RKpnI15289: from=<stanley.j.potts at uwrf.edu>, size=1708,
 class=-60, nrcpts=3, msgid=<se354441.015 at adngate.adn.uwrf.edu>,
proto=ESMTP, daemon=MTA-IPv4, relay=mcda4-4-0-0-321.rback0.mi
lw.wi.voyager.net [169.207.146.116] (may be forged)
syslog:Jan 27 14:53:53 badger sendmail[15364]: [ID 801593 mail.info]
h0RKrqI15364: from=<stanley.j.potts at uwrf.edu>, size=1729,
 class=-60, nrcpts=3, msgid=<se354441.015 at adngate.adn.uwrf.edu>,
proto=ESMTP, daemon=MTA-IPv4, relay=mcda4-4-0-0-321.rback0.mi
lw.wi.voyager.net [169.207.146.116] (may be forged)