mailservers hijacked

I have an RSE server at OLM and recently my mailservers were hijacked and used for sending spam.

If it makes any difference, we use the Ensim control panel.

When I discovered the servers were hijacked I immediately removed all IPs from the "relay ip" box in the conrol panel.

What else can I do to help with mailserver security (I asked this at OLM over a week ago and have no reply yet).


Thanks for the help!

 

 

 

 

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