I just received the following message:
<xxx.xxx.xxx>: host mail.global.sprint.com[xx.xx.xx.xx] said: 550
5.7.1 Service unavailable; Client host [yy.yy.yy.yy] blocked using
Blocklist 1, mail from IP banned; To request removal from this list please
forward this message to email@example.com. (in reply to RCPT
i suspect somebody has infiltrated a machine and is sending out spam. is there a logfile report i can run to see how many emails are being sent and to what IP addresses?