# ISP-based anti-spam countermeasures

**URL:** <https://meta.discourse.org/t/isp-based-anti-spam-countermeasures/20082>\
**Category:** Feature\
**Created:** [September 15, 2014, 5:41pm UTC](https://meta.discourse.org/t/isp-based-anti-spam-countermeasures/20082 "2014-09-15T17:41:36Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![codinghorror](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/codinghorror/32/110067_2.png) [@codinghorror](https://meta.discourse.org/u/codinghorror)\
**Post date:** [August 11, 2015, 4:45pm UTC](https://meta.discourse.org/t/isp-based-anti-spam-countermeasures/20082/13 "2015-08-11T16:45:09Z")

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Huge IP range blocks can be justified in this case since there is total overlap.

When the attackers come from a ton of different IPs, that is when IP blocks become unworkable.

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