On 09/03/2012 10:35 AM, Nick Ellson wrote:
> Sep  3 10:21:16 gubbie courieresmtpd: Maximum connection limit reached
> for 166.147.93.214
> What can I go digging for to solve this?

Check MAXPERC and MAXPERIP in /etc/courier/esmtpd.

'netstat -tenp | grep :587' will show you how many open connections 
exist on port 587.

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