S25R + tarpitting + greylisting - a tarpit + greylisting policy server.
taRgrey is a patch that makes postgrey into a tarpitting policy server. Tarpitting means response delay for blocking spam. taRgrey is designed to decrease false positives.
-- http://k2net.hakuba.jp/targrey/index.en.html
The concept of the Selective SMTP Rejection (S25R) anti-spam system, [...] is so simple that a mail server accepts SMTP accesses from mail relay servers but rejects direct SMTP accesses from end-user's computers.
-- http://www.gabacho-net.jp/en/anti-spam/anti-spam-system.html
Postgrey is written for Perl 5.
TZ
: timezone used for logging, defaults to UTC
/var/spool/postfix/postgrey
: greylist triplets - owner 100, group 101, mode 0770
10023/tcp
make run
make clean
make build
make
make debug