>I have an older IMGate still running regexp, but I was told by IMail >tech support that it looked like someone was using our IMGate machine as >their mail gateway
... based on what evidence?? >and sending SPAM out it. Let's say my IMGate box is >ip.add.111.111 and the IMail box is ip.add.111.112. Is it possible for >someone to use ip.add.111.111 as their SMTP server. of course. That's why you have to limit the main.cf mynetworks param to the minimum number of IPs that you can trust to relay mail through IMGate. >I tried to test it >and it failed google for "open relay test" and use one of those. but if you telnet to imgate:25 from a non-mynetworks IP and try to send to a non-transport.map @recipient.domain, it should fail. >but I want to make sure that it is locked down. Thanks >for the help. what do you see in the postfix maillog that looks like unrestricted relaying? Len
