On Mon, 3 Dec 2012 22:03:25 +0200 Henrik K <h...@hege.li> wrote: > On Mon, Dec 03, 2012 at 01:54:44PM -0500, Kevin A. McGrail wrote:
[Test loadavg in filtering decisions] > Seems kind of pointless. Have you actually measured how larger > messages affect cpu usage? Especially since usually there are much > less messages the larger they get. I agree. LoadAVG is a pretty useless measurement. And relaxing your filtering based on load gives spammers a clear signal how to defeat your filter. > > Two, I'm trying a system that also truncates messages mid-message at > > the threshold to scan them anyway. > Why is it controversial? Amavisd-new 2.6.3 had this feature since > 2009, so it's used probably very widely - even without users knowing > it. I've never seen any ill effects. We truncate overly-long messages too, but we try to be intelligent about it. We shrink non-text MIME parts first and then if the message is still too large, we give up. Just blindly cutting a message in the middle might wreck the MIME structure and give unexpected and unwanted results. Regards, David.
