Dirk Kulmsee writes:
> I wonder if there is a way to deactivate the teergrube in Courier without recompiling?Nope. > Maybe there is even a way to exclude (whitelist) single IPs from tarpitting? Stripping a mail server of its defenses against hostile peers, instead of fixing whatever problem causes the peer to shovel crap in the server's direction, is a rather foolish and a naive decision.Hi Sam, I _definitely_ agree with you. Courier has been serving us well for years now, teergrube included. The reason why I want to know is, that I want to use a spam filter in front of courier on a separate machine. This would be ASSP (assp.sourceforge.net) which works as a proxy. Now if mailserver.somewhere.com wants to send me an email Courier logs like this: Nov 14 01:01:16 jupiter courierd: newmsg,id=007174C6.473A3AC6.00007A1F: dns; lists-outbound.sourceforge.net (sirius.netgroup.de [::ffff:195.138.34.209]) [...] Nov 14 01:01:20 jupiter courierd: completed,id=007174C6.473A3AC6.00007A1F If all incoming connections, good or bad, carry the IP of my spam filter then I am afraid of tarpitting my own machine. There are strange delays and I would like to check if tarpitting is the reason.
Tarpitting would be the reason only if you see actual errors in the maillog. Only errors are the triggers for any tarpitting.
I find no reason why you would reject mail from your proxy, provided that your proxy only accepts mail for recipient addresses that actually exist, and its various settings are not any less liberal than Courier's; such as that it does not accept any mail that's larger than the maximum size of an email message that Courier is willing to accept.
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