efa-project.org

It can be useful to weite a plugin that query for this database using the given key


https://www.projecthoneypot.org/httpbl_api.php

Would this be for the web interface, to prevent potentially malicious scripts from being able to attempt to log in?

Or are you suggesting that hosts which appear to be crawling websites are probably also going to be sending spam, and thus this data should be fed into SA?

Put a reverse proxy in front of your web application

like this : https://www.vultureproject.org/ and this is a waf server

efa-user, no it's a tool used to recognize the IP of spam harvesters, so mail coming from these addresses are more likely to be spam.

It's yet another tool to add weighting to help determine if mail is junk or not.

so basically "that hosts which appear to be crawling websites are probably also going to be sending spam, and thus this data should be fed into SA" ?

not sure that projecthoneypot fits in here, apparently is does report 4 categories of IPs. Email Spammers specifically are not in there.

Value Meaning
0 Search Engine
1 Suspicious
2 Harvester
4 Comment Spammer