How to stop spamming :(

Hi How to stop spamming :(

My first post.. I read the rules and it seems that this is the place to post. Sorry if I am in wrong thread.

I need help on
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NOC says that spam mails are getting through my server and they are right too. AOL sends me reports of 100's of them. I doubt it is a mail script as I see the apache@serverhostname.tld in the mail logs. I disabled the mail function of PHP. But it is continuing..How to stop spamming :( My questions to techies here are

1) If possible, how can I block the mail function used in perl/cgi script ?
2) I removed the server's hostname from the /etc/localdomains. Is it a right move ?
3) External domains relay are disabled.
4) How to find the script and who is executing it and which domain ?
5) How can I prevent such attacks in future ?

Thanks for all your help with this How to stop spamming :(

Maddy.

 

 

 

 

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