vBulletin Error Email Code

[cerjam]

My site's getting max_user_connections from a pathetic DOS attack on it, im writing a script to block it, but i need a placement to detect where to block the attackers IP. i've decided to do it where vbulletin sends me the error email, so..

What PHP script sends this email? i can handle it after that.

and any other suggestions to edit my hack into somewhere else? I'm really jerryrigging it =/

Thanks