On Sun, Nov 21, 2010 at 2:58 AM, Guruprasad <g...@baysoft.in> wrote: > I am using PFSense firewall in my office. I have a windows based mail > server in LAN and all the systems in LAN send mails thru the > mailserver(icewarp merak mail server). There is no spam problem. > > But the moment I allow my branch office people to send/receive mails using > my local mail server via my ISP allocated static IP ( this is configured in > pfsense WAN), lots of spam/virus being relayed thru my mail server and I > could see the same in my mail server Log. > > Since many roaming users/branch office people are connected to this mail > server, how do I find out which remote client is compromised and sending > this spams using my internal mail server as a relay host. > Thank depends on your mail server. I would suggest that you ask this on a forum dedicated to the mail server you are using.
- Y
