В логах иногда светится это.
Message from IP address 127.0.0.1, sender <user@computer> rejected: sender domain does not exist
root@mail:/etc# ps -ef
UID PID PPID C STIME TTY TIME CMD
root 1 0 0 Jul27 ? 00:00:01 init [3]
root 2 0 0 Jul27 ? 00:00:00 [kthreadd]
root 3 2 0 Jul27 ? 00:00:01 [ksoftirqd/0]
root 5 2 0 Jul27 ? 00:00:00 [kworker/u:0]
root 6 2 0 Jul27 ? 00:00:00 [migration/0]
root 7 2 0 Jul27 ? 00:00:00 [migration/1]
root 9 2 0 Jul27 ? 00:00:01 [ksoftirqd/1]
root 11 2 0 Jul27 ? 00:00:00 [migration/2]
root 12 2 0 Jul27 ? 00:00:00 [kworker/2:0]
root 13 2 0 Jul27 ? 00:00:01 [ksoftirqd/2]
root 14 2 0 Jul27 ? 00:00:00 [migration/3]
root 15 2 0 Jul27 ? 00:00:00 [kworker/3:0]
root 16 2 0 Jul27 ? 00:00:01 [ksoftirqd/3]
root 17 2 0 Jul27 ? 00:00:00 [cpuset]
root 18 2 0 Jul27 ? 00:00:00 [khelper]
root 19 2 0 Jul27 ? 00:00:00 [kdevtmpfs]
root 20 2 0 Jul27 ? 00:00:00 [netns]
root 227 2 0 Jul27 ? 00:00:00 [sync_supers]
root 229 2 0 Jul27 ? 00:00:00 [bdi-default]
root 231 2 0 Jul27 ? 00:00:00 [kblockd]
root 411 2 0 Jul27 ? 00:00:00 [ata_sff]
root 418 2 0 Jul27 ? 00:00:00 [khubd]
root 424 2 0 Jul27 ? 00:00:00 [md]
root 531 2 0 Jul27 ? 00:00:00 [rpciod]
root 580 2 0 Jul27 ? 00:00:00 [khungtaskd]
root 586 2 0 Jul27 ? 00:00:15 [kswapd0]
root 655 2 0 Jul27 ? 00:00:01 [khugepaged]
root 657 2 0 Jul27 ? 00:00:00 [fsnotify_mark]
root 661 2 0 Jul27 ? 00:00:00 [nfsiod]
root 667 2 0 Jul27 ? 00:00:00 [crypto]
root 711 2 0 Jul27 ? 00:00:00 [kthrotld]
root 808 2 0 Jul27 ? 00:00:00 [kworker/1:1]
root 809 2 0 13:26 ? 00:00:00 [kworker/0:0]
root 810 2 0 Jul27 ? 00:00:00 [kworker/3:1]
root 875 2 0 Jul27 ? 00:00:00 [scsi_eh_0]
root 878 2 0 Jul27 ? 00:00:00 [scsi_eh_1]
root 881 2 0 Jul27 ? 00:00:00 [scsi_eh_2]
root 884 2 0 Jul27 ? 00:00:00 [scsi_eh_3]
root 887 2 0 Jul27 ? 00:00:00 [scsi_eh_4]
root 890 2 0 Jul27 ? 00:00:00 [scsi_eh_5]
root 898 2 0 Jul27 ? 00:00:00 [kworker/u:7]
root 1048 2 0 Jul27 ? 00:00:00 [devfreq_wq]
root 1091 2 0 13:36 ? 00:00:00 [kworker/0:1]
root 1259 2 0 13:42 ? 00:00:00 [kworker/0:2]
root 1263 2 0 Jul27 ? 00:00:01 [md0_raid1]
root 1281 2 0 Jul27 ? 00:00:00 [md1_raid1]
root 1298 2 0 Jul27 ? 00:00:02 [md2_raid1]
root 1326 2 0 Jul27 ? 00:00:01 [jbd2/md0-8]
root 1327 2 0 Jul27 ? 00:00:00 [ext4-dio-unwrit]
root 1381 1 0 Jul27 ? 00:00:00 /sbin/udevd --daemon
root 1395 2 0 Jul27 ? 00:00:00 [kworker/2:2]
root 1465 26629 0 13:49 pts/0 00:00:00 ps -ef
root 1487 2 0 Jul27 ? 00:00:00 [kpsmoused]
root 1493 2 0 Jul27 ? 00:00:00 [kworker/1:2]
root 1564 2 0 Jul27 ? 00:00:04 [jbd2/md2-8]
root 1565 2 0 Jul27 ? 00:00:00 [ext4-dio-unwrit]
root 1599 1 0 Jul27 ? 00:00:02 /usr/sbin/syslogd
root 1603 1 0 Jul27 ? 00:00:02 /usr/sbin/klogd -c 3 -x
root 1656 1381 0 Jul27 ? 00:00:00 /sbin/udevd --daemon
root 1657 1381 0 Jul27 ? 00:00:00 /sbin/udevd --daemon
root 1698 2 0 Jul27 ? 00:00:00 [flush-9:0]
root 1699 2 0 Jul27 ? 00:00:11 [flush-9:2]
root 1868 1 0 Jul27 ? 00:00:00 /usr/sbin/inetd
root 1873 1 0 Jul27 ? 00:00:00 /usr/sbin/sshd
bin 1890 1 0 Jul27 ? 00:00:00 /sbin/rpc.portmap
root 1894 1 0 Jul27 ? 00:00:00 /sbin/rpc.statd
root 1898 1 0 Jul27 ? 00:00:00 /usr/sbin/rpc.rquotad
root 1902 2 0 Jul27 ? 00:00:00 [lockd]
root 1903 2 0 Jul27 ? 00:00:00 [nfsd4]
root 1904 2 0 Jul27 ? 00:00:00 [nfsd4_callbacks]
root 1905 2 0 Jul27 ? 00:00:00 [nfsd]
root 1906 2 0 Jul27 ? 00:00:00 [nfsd]
root 1907 2 0 Jul27 ? 00:00:00 [nfsd]
root 1908 2 0 Jul27 ? 00:00:00 [nfsd]
root 1909 2 0 Jul27 ? 00:00:00 [nfsd]
root 1910 2 0 Jul27 ? 00:00:00 [nfsd]
root 1911 2 0 Jul27 ? 00:00:00 [nfsd]
root 1912 2 0 Jul27 ? 00:00:00 [nfsd]
root 1914 1 0 Jul27 ? 00:00:00 /usr/sbin/rpc.mountd
root 1919 1 0 Jul27 ? 00:00:01 /usr/sbin/ntpd -g -p /var/run/ntpd.pid
root 1924 1 0 Jul27 ? 00:00:00 /usr/sbin/acpid
root 1931 1 0 Jul27 ? 00:00:00 /usr/sbin/crond -l notice
daemon 1933 1 0 Jul27 ? 00:00:00 /usr/sbin/atd -b 15 -l 1
root 2164 1 0 Jul27 ? 00:00:00 savd etc/savd.cfg
root 2263 1 0 Jul27 tty1 00:00:00 /sbin/agetty --noclear 38400 tty1 linux
root 2264 1 0 Jul27 tty2 00:00:00 /sbin/agetty 38400 tty2 linux
root 2265 1 0 Jul27 tty3 00:00:00 /sbin/agetty 38400 tty3 linux
root 2266 1 0 Jul27 tty4 00:00:00 /sbin/agetty 38400 tty4 linux
root 2267 1 0 Jul27 tty5 00:00:00 /sbin/agetty 38400 tty5 linux
root 2268 1 0 Jul27 tty6 00:00:00 /sbin/agetty 38400 tty6 linux
root 4777 2164 0 Jul27 ? 00:00:00 savscand --incident=unix://tmp/incident --namedscan=unix://root@tmp/namedscansprocessor.2 --ondemandcontrol=socketpair://42/43
root 26623 1873 0 09:50 ? 00:00:00 sshd: root@pts/0
root 26629 26623 0 09:50 pts/0 00:00:00 -bash