You have reached your daily smtp relay limit
I have fedora 9 installed on my server, i keep receiving this message every few days "YOU HAVE REACHED YOUR DAILY SMTP RELAY LIMIT", we have few sites running on our web server, i believe someone is using our contact forms for spam? i need to check which site was used for this attack, however i was not able to find which log file i need to open to find the emails that were sent?
is there a way that i can find which website is causing this?
any help would be appreciated.