1. DJB/netqmail/qmail-spp

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

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