Publicly displays Postfix-policyd's blacklist in real time. Quite useful (in some countries even mandatory) for e-mail hosting to keep your customers informed about blocked smtp hosts and give them the chance to unsubscribe from SPAM-filtering.
- directly reads and displays policyd databases in XHTML
- informs email account holders about blacklisting policy
- external css - easy to adapt/embed
- "fire and forget"
Good developed. Highly recommended.