I have running exchange 2007 on win 2008.
Since some weeks I have a problems with spam.
every day I get emails with the subject :MAILER-DAEMON@mail.nt-tech.com.au
Lets say our domain is email.at
The sender of the email is our domain, but the user is not available it is just a weird number, like this: From: "Vigara.Info" <5B0785A14@email.at>
What can I do to stop this or analyse ?