Good evening, I am in the process of setting up a smtp-relay for a hosting provider.
Basically, the relay should relay emails from hundreds of servers out to the net. I do want some "protection" against if a website is hacked and starts to spew out thousands of emails. For example: www.siteA.xyz on ServerY is hacked and someone is using mail() in order to send hundreds of thousands email via localhost - that is relayed to the smtp relay (that only accepts mail from internal servers). And instead of relaying them out to the web it does stop thoose kind of email. Is that possible? Can postfix just dump the emails "down the drain" instead of sending them? And can that be triggered if ServerY sends 100 emails in 10 seconds for example. I hope my problem is easy to understand :) / Jonathan
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