[Mimedefang] Greylisting Code on Wiki
mimedefang at nabs.net
Wed Dec 12 20:47:02 EST 2007
On 12 Dec 2007 at 19:03, Paul Murphy wrote:
> One issue which I've seen is on low-usage systems (such as my home server),
> the MySQL connection times out, meaning that the slaves crash when the next
> message comes in to them. I tried lots of things to stop this happening,
> including cached connections and checking the connection status and
> reconnecting if it wasn't live, but basically I couldn't avoid the slave
> dying. However, this is no real problem - the multiplexor starts a new one,
> the sender tries again, and all is well, since this only happens on very
> lightly loaded systems, and I have 2 slaves in total at quiet periods.
I never have more than 2 slaves in my implementation, but never have
these timeouts. I suspect it's because I scavenge the greylist every 5
minutes using the filter_tick hook in MD. I also do opportunistic
generation of 25-bit hashcashes during filter_tick, so that I can have
them handy when the next outgoing e-mail to that recipient is sent.
Since SpamAssassin in the default config puts some nice negative scores
on the larger hashcash headers, it's a pretty good use of otherwise
I also have two MXs that both connect to the same database, so that
makes it even more likely I have some real idle time.
Jeff Rife |
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