hi all,
i have a network of about 120 systems behind an Microsoft ISA server. i have blocked all ports except the necessary ones. i keep getting complaints from my ISP about spamming from the ISA IP. i believe its a client machine which could be infected with virus, thus runing smpt engine. i cant block port 25 on the ISA cos it would prevent clients from popping mails from our mail server which is on the Internet.
Anyone with a suggestion of what could be done.?
