[IMail Forum] Open Relay

[Laurent Tran Van Vinh]

Hi,   I set my SMPT security to "Relay for local host only", apply all the patches available on the ipswitch site.   Problem: yesterday someone who is not a member of the local host managed to use my server as a open relay and spammed others. I received a complain from the abuse website.   How can I fix this problem to prevent people from using my server to spam others?   Thanks in advance for your answers.   Laurent Tran