[EMAIL PROTECTED] wrote:
Is there any way to set courier to automagically blacklist an IP that has tried to contact multiple IDs to see if they are valid after a few attempts? I'm trying to save cycles from dealing with these attacks.
It's not a Courier solution, but OpenBSD's 'spamd' (and presumably other greylisting products) is effective in stopping dictionary attacks, even with an adversary who has a bunch of zombies.
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