"Shawn" == Shawn Wallbridge shawn@synack-hosting.com writes:
Shawn> If you happen to be running OpenBSD or FreeBSD, you can run Shawn> spamd (not part of spamassassin). It does greylisting for Shawn> any MTA and add's almost no load to the machine. To enable Shawn> it on OpenBSD requires removing 6 comment #'s (IIRC).
That is easy, though qpsmtpd on Debian was pretty easy as well. The main catch was to move qmail to listen only on localhost, since the external interface now has qpsmtpd instead.
So far, so good. No spam in the spambox this morning, at all. Most were caught by the Spamhaus DNS blocklist I already use, but the greylist whacked the remainder.
Some of the other plugins look interesting too, but weren't involved in the first few hours. They basically look for weird behaviour which spammers engage in, such as starting to chatter before the SMTP greeting. I'm leaving the log level high for a bit, as I'm curious about how often these show up.
Tim