Sendmail a hlasky v logu

[Tomas Lada]

Dobry den
dnes jsem nasel nasledujici hlasky v logu.....

g2H7rB506831: [61.167.142.216]: EXPN root
g2H7rD506832: [61.167.142.216]: EXPN admin
g2H7rG506833: [61.167.142.216]: EXPN backup
g2H7rY506834: [61.167.142.216]: EXPN access
g2H7rb506835: [61.167.142.216]: EXPN account
g2H7r9506830: [61.167.142.216]: possible SMTP attack: command=EXPN, count=6
g2H7rl506836: [61.167.142.216]: EXPN webmaster
g2H7rv506837: [61.167.142.216]: EXPN data
g2H7s0506838: [61.167.142.216]: EXPN sybase
g2H7s4506840: [61.167.142.216]: EXPN oracle
g2H7sC506843: [61.167.142.216]: EXPN test
g2H7sN506845: [61.167.142.216]: EXPN user
g2H7sR506846: [61.167.142.216]: EXPN web
g2H7sd506847: [61.167.142.216]: EXPN root
NOQUEUE: [61.167.142.216] did not issue MAIL/EXPN/VRFY/ETRN during
connection to Daemon0
g2H7sd506847: SYSERR: putoutmsg ([61.167.142.216]): error on output channel
sending "250 2.1.5 root <lada na bitservis.cz>": Broken pipe
g2H7ul506852: [61.167.142.216]: VRFY root
NOQUEUE: ntbit.bitservis.cz [212.71.189.18] did not issue
MAIL/EXPN/VRFY/ETRN during connection to Daemon0
g2H7ul506852: SYSERR: putoutmsg ([61.167.142.216]): error on output channel
sending "250 2.1.5 root <root na name.bitis.cz>": Broken pipe

Nekdo z Ciny se snazil ziskat databazi aliasu pro uzivatele "root,
admin,backup...." via sendmail. Daji se nedkde dohledat ty zpravy?
Nejsem si jisty jestli mam expn vypnuty...
Uvitam Vase nazory, diky
:-)
S pozdravem
                     Tomas Lada