The idea of spam throttling came about after would-be spammers were easily circumventing (classic) tarpitting. A reasonable recipient limit in tarpitting must not adversely affect acceptable mail usage, so spam clients typically create multiple SMTP conne
I have set up a particular email discussion list to deal with the following issues: * SPAMCONTROL: release announcements, additional usage information, forthcoming developments * QMVC: release announcements, usage, additional templates * NEWANALYSE: relea
What we'd like to do is allow mail relaying from a selected group of IP addresses only. If you've just been reading the qmail newbie's guide to relaying, you know that we do this be setting the environment variable RELAYCLIENT in qmail-smtpd's environment