ISP port blocking practice

[randy at psg.com (Randy Bush)]

> No.  It'd just increase a LOT, astronomically.
>> i suspect that, if we opened smtp relays again, unblocked 25 for
>> consumer chokeband, etc., total spam received would likely increase a
>> bit. ?but my guess, and i mean guess, is that the limiting parameter
>> could well be how many bots the perps can get, not how well those
>> bots are blocked.

i keep hearing that, but am having a hard time finding supporting data.

randy