Re: Deterring mail relay attempts
Alan Chandler <alan@chandlerfamily.org.uk> wrote:
> I have just moved my mail server (exim4 split config based) from one
> machine to another, and in doing so started examining the logs. I am
> being hit with multiple attempts to relay - several a second. They come
> in bursts from one host, then come from somewhere else.
> I would like to put some for of inconvenient barrier up so perhaps they
> stop bothering me.
> What is a good way of deterring them?
Fail2ban is remarkably good at helping deter probes such as relay
attempts. Get it working "out of the box" and then tweak it to match
against other exim messages.
Chris
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