We are using exchange 2003 server SP2 in front end and backend configuration. front end is hosted in dmz and back end is placed in internal network.
We are getting thousands of email to one particular user from one email address and all mails are going to junk email folder on users outlook 2003. As soon as users start outlook 2003 mail starts coming so legitimate mails are not able to come into inbox.
My questions are: 1) How to stop these mails coming to users inbox?
2) Sender of junk email has mail address as email@example.com, where mycompany.com is my domain name. But xyz user is not actually active directory user. so how this is possible that spammer is using my domain name. I have not enabled relaying in exchange.