On Wed, Jul 22, 2015 at 05:55:04PM +0300, Edgaras Luko?evi?ius wrote: > All this is done to put users into our own "classes" (eg. spammers vs. > non-spammers).
If your autheneticated submission user is spamming, suspend their ability to send outbound email. > Because there are clean and dirty IP pools and if we see that > user *may be* abusing email (or any other) system we want to put them to > "dirty" pool for some time. Don't operate a "dirty" pool. > While this works with ordinary senders, it does > not for aliases and spammers are abusing that (we have a few IP addresses > blacklisted by gmail, yahoo, hotmail because of this). Sounds like you're allowing users to create aliases that forward mail to third-parties. Don't let them do that. Require confirmation in response to a mail you generate, before activating the alias. If not, explain in more detail. -- Viktor.