BLD stands for "blacklist daemon" and is intended to serve a blacklist.
The blacklist is built by simply inserting IP addresses or by using
submission rate limits based on a maximum number of submissions of the
same IP address within a minimum time interval. You can build a BLD
cluster by configuring the daemon to notify other similar daemon(s)
every time an IP address is added to the blacklist. BLD was primarily
designed to fight against dictionary-based spams (by making the MTA
report to BLD any host that tries to send a mail to an unknown user)
but can be used by any program.

See /usr/share/doc/bld-0.3.4.1/COPYRIGHT for license.

• Leontiy Volodin
• Alexey Morsov

• bld