I've got a problem with a server of mine since i've converted it to SBS 2003 with Exchange 2003 SP2. It keeps sending out spam. I've tried to empty the Queues true Explorer and used the "find' option within Exchange to remove the mails. But they keep filling up the queue. But only when the Default SMTP server is active. When it's disabled the filling up stops. But my harddrive is also filling up very fast...some GB per hour or so...
We've got the following configuration > Domainname with MX record set to send to our server directly.
I've got the following Security settings;
- Guest Account disabled
- Under tab Access (Default SMTP server options) > Access Control - I have selected "Anonymous acces / Basic Authentication & Integrated windows authentication".
- Under tab Access (Default SMTP server options) > Connection Control - i've selected "all but the list below"
- Under tab Access (Default SMTP server options) > Relay restrictions - i've selected "all but the list below"
When I disable the Relay Restrictions, the filling up of the spam is stopped. But so it my regular email...the ones i would like to receive. Isn't it right that in order to receive emails from the outside world you have to have an open relay?
What can i do to prevent my server from sending spam???
Got a little overview of the servers who are connection to my server and sending mail...perhaps that's more clear..