out Server is not open relay. still there is any way to find out if my server has been compromised by spammer or not ??
because today, i have received an email from Shawbiz.ca, the guy saying someone at 9.48 pm sent him email from our company email address which is actally spam email.
the username he said, we dont have any user , i have check message tracking to check what happended 9.48 pm
but no email has been sent out side at that time by that email address.
from my understanding : message trackign with show outgoing and imcommign message is nto it ??
so what shall i assume, my server has been compromised by spammer ??