1. DJB/netqmail/qmail-spp
http://qmail-spp.sourceforge.net/
UbuntuのTCPSERVERは$DNSCACHEIPを見るらしい。
- rblsmtpdやbadheloはどうなのか。
https://notes.sagredo.eu/files/qmail/patches/qmail-spp/
sagredo: https://notes.sagredo.eu/files/qmail/patches/qmail-spp/plugins/
2. qmail-spp
The main default configuration file of qmail-spp is
/var/qmail/control/smtpplugins
It consist of few sections, one for each command:
connection - for plugins run just after client connection
helo - for HELO/EHLO
mail - for MAIL
rcpt - for RCPT
data - for DATA
auth - for AUTH (if supported)Section names are marked using square brackets ('[' and ']').
After section name there are plugins to execute for this command - one per line.
Example:
# smtpplugins sample file
[connection]
:plugins/rbl -r relays.ordb.org