Sorry if it has been discussed before. But I am really looking forward to having the ability to use connection tarpit as used in Sendmail. (aka ratecontrol).
This is quite fundamentally different in characteristic than "Recipients per hour"
In fact, to combat with "Outgoing spamming", this ratecontrol is more effective. Outgoing spamming have a very constant pattern of sending spam (and virus) via continuous rate.
Sendmail ratecontrol IS - a tarpitting concept. Once the rate is reached , an IP must wait a time delay before ANY new connection is to be accpted
Recipient control IS - a queuing concept. Once there is an "free" ticket in the last hour, your connection will be accpted and IRpt will try to deliver as it should be.
With the "continuous" spamming in mind. The sendmail thing is more effective.
We use both here.
Any comment here from all the gurus?