RE: ISP Level Postgrey
Hi!
Greylisting should not be CPU intensive - it's just comparing triplets
from+to+ip with database. So the problem is database itself. I don't know
BerkleyDB much, but I think 1.7GB is too much for it and then every update
takes so long.
I don't know if it's possible to get the database smaller for your amount of
mail. We receive ~20.000 messages/day and postgrey db is ~20 MB. Are you
sure the maintenance is working without errors? It should produce statistics
to syslog.
Another option for large scale sites may be rewriting postgrey (or making
your own grelisting daemon) using some real database such as mysql.
--
bYE, Marki
> -----Original Message-----
> From: Lee Wilson [mailto:treebiter@mac.com]
> Sent: Wednesday, July 12, 2006 8:00 PM
> To: debian-isp@lists.debian.org
> Subject: ISP Level Postgrey
>
> Hi everyone,
>
> I am new to the mailing list and saw some talk about postgrey
> a couple of years ago, but nothing in the last couple of
> months. I am the postmaster for a medium sized ISP and we are
> looking to implement greylisting, as we are getting buried by spam.
>
> I started testing postgrey in our environment, but I was
> wondering if anyone would share some of their
> tips/successes/configurations to help me along. I already had
> the DB climb to an insane size (1.7 GB - under a slightly
> different config than below) and I want to keep that value
> down. The DB purge of expired data was not playing well with
> postfix at this size.
>
> Here is the /etc/default/postgrey config that I am testing
> using postgrey 1.25-1.
>
> --greylist-action=WARN --max-age=8 --retry-window=12h
> --delay=315 --auto-whitelist-clients=1 --greylist-text=Busy
> --inet=192.168.1.1:60000
>
> I am running postgrey on a separate server from our incoming
> mail MTAs. We are taking in around 350 million message a
> month, so I am hoping that I can get postgrey to work for us.
> However, I may be just too hopeful about getting postgrey to
> work at that level. Under this load, postgrey is consuming 1
> of the 2 cpus on the box 100% of the time.
>
> I see that the postgrey 1.26-1 is out and should have some DB
> cleanup efficiencies, but I (so far) haven't found much
> detail about what has changed and what I can expect from that.
>
> Any help would be extremely appreciated. I am itching to turn
> on greylisting to save my sanity.
>
>
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