Become a spammer Test yourself with plesk.com server ;-) 1. Set the smtp authentication in psa!! 2. Create an email account in your mail client Your email email@example.com user and password = blank (not important) 3. send a message to firstname.lastname@example.org and CC 2 milions addresses. You will be able to address your spam to 2 milion users using a fake plesk address (email@example.com) * THIS IS JUST AN EXAMPLE TEST IT ON YOUR SERVER AND CC A COUPLE OF ADDRESSES OUTSIDE. IT'S THE SAME BUT YOU WILL UNDERSTAND WHAT I MEAN. This is a big big bug in qmail and I hope you can help me solve this problem. My server has been used for days to spam the world!!!! I could not find a real professional solution. Worst case it is difficult to get that you have been hacked. Once you find that, you have to monitor your tcp and find the ip address.. then put it behind a firewall. Any ideas???