On Thu, 2004-07-29 at 10:06, Steve Dimoff wrote:
> We process the following messages usually a day:
>
> Statistics by Hour
> ----------------------------------------------------
> Hour Spam Ham
> ------------- ----------------- --------------
> 2004-07-28 00 1595 ( 87%) 234 ( 12%)
> 2004-07-28 01 1818 ( 83%) 356 ( 16%)
> 2004-07-28 02 1279 ( 79%) 326 ( 20%)
> 2004-07-28 03 1693 ( 88%) 230 ( 11%)
> 2004-07-28 04 1840 ( 80%) 455 ( 19%)
> 2004-07-28 05 1394 ( 84%) 264 ( 15%)
> 2004-07-28 06 1591 ( 87%) 236 ( 12%)
> 2004-07-28 07 2136 ( 88%) 284 ( 11%)
> 2004-07-28 08 1541 ( 71%) 612 ( 28%)
> 2004-07-28 09 1507 ( 57%) 1109 ( 42%)
> 2004-07-28 10 1611 ( 70%) 673 ( 29%)
> 2004-07-28 11 581 ( 68%) 272 ( 31%)
> 2004-07-28 12 1343 ( 66%) 685 ( 33%)
> 2004-07-28 13 2106 ( 68%) 962 ( 31%)
> 2004-07-28 14 1644 ( 73%) 596 ( 26%)
> 2004-07-28 15 1411 ( 61%) 898 ( 38%)
> 2004-07-28 16 1820 ( 72%) 693 ( 27%)
> 2004-07-28 17 1411 ( 75%) 464 ( 24%)
> 2004-07-28 18 1491 ( 81%) 342 ( 18%)
> 2004-07-28 19 1296 ( 73%) 457 ( 26%)
> 2004-07-28 20 1116 ( 75%) 372 ( 25%)
> 2004-07-28 21 1461 ( 77%) 426 ( 22%)
> 2004-07-28 22 1286 ( 78%) 345 ( 21%)
> 2004-07-28 23 1325 ( 79%) 344 ( 20%)
>
> Around the times where we get flooded and receive around 2000+ messages an
> hour the system goes into a meltdown.
>
> SPAMD is taking up most of the processes. The system stops accepting new
> mail connections. Once it's processed what's in Qmail's connection then it
> starts to accept until it's full again.
One option you should consider is implementing greylisting. Not sure
what is available to use with Qmail. I used milter-greylist with my
sendmail configuration and have managed to knock spam down to literally
a handful a day. With your volume you can probably knock the spam you
process with spamassassin down to a 100 or so per day.
And I have found that setting a relatively small timeout (a couple of
minutes) works just fine. I have seen virtually no difference to that
or using 30 minutes.
The combination of greylisting and spamassassin has worked wonders.
--
Scot L. Harris
[EMAIL PROTECTED]
I'll meet you... on the dark side of the moon...
-- Pink Floyd
