This email is sent by logcheck. If you wish to no-longer receive it, you can either deinstall the logcheck package or modify its configuration file (/etc/logcheck/logcheck.conf). Security Events =-=-=-=-=-=-=-= Jun 29 15:49:11 ogs sshd[17052]: Invalid user admin from 222.122.140.53 System Events =-=-=-=-=-=-= Jun 29 15:49:08 ogs sshd[17050]: Invalid user delta from 222.122.140.53 Jun 29 15:49:14 ogs sshd[17054]: Invalid user test from 222.122.140.53 Jun 29 15:49:17 ogs sshd[17056]: Invalid user testing from 222.122.140.53 Jun 29 15:49:20 ogs sshd[17059]: Invalid user tester from 222.122.140.53 Jun 29 15:49:24 ogs sshd[17061]: Invalid user academy from 222.122.140.53 Jun 29 15:49:27 ogs sshd[17063]: Invalid user protector from 222.122.140.53 Jun 29 15:49:33 ogs sshd[17072]: Invalid user skylyn from 222.122.140.53 Jun 29 15:49:36 ogs sshd[17074]: Invalid user guest from 222.122.140.53 Jun 29 15:49:40 ogs sshd[17076]: Invalid user webmaster from 222.122.140.53 Jun 29 15:49:43 ogs sshd[17086]: Invalid user master from 222.122.140.53