exchange 2003, user spoof, sending spam using one of our users
Posted on 2013-06-11
I have a mail server, in Queue, there's multiple outgoing mails are stuck on sending from a specific user. But the user's outlook doesn't show she sent mails out. The outgoing emails are also seem to be spam going to external random addresses. I think changing/correcting settings at SMTP virtual server of the mail server can resolve this problem. Can you advise?
Relay under SMTP virtual server/properties/Access/Relay is restricted to our LAN IPs of a few servers.
Under SMTP virtual server/properties/Access/Authentication, both Anonymous access and Integrated Windows Authentication are checked.
Unser SMTP virtual server/properties/Delivery/Outbound Security, Anonymous access is checked.
Windows 2003 SP2
Exhcnage 2003 SP2