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...It uses the Project Honeypot API (www.projecthoneypot.org) to check IP and MX addresses and verifies that email addresses are not in lists of known disposable mail servers.
Licence: Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported CC BY-NC-SA 3
This project will be the candidate reference implementation (RI) and candidate technology compatibility kit (TCK) for JCP JSR188, the CC/PP Processing Java API:
http://www.jcp.org/en/jsr/detail?id=188