Hello!
I'm working at the University of Örebro and we are running milter greylist and we have been so for a couple of years.
Our site is not so busy as yours but we have experiensed a problem this summer resulting in zombie sendmail demons.
A rather big amount of connections from around the world just hanging and dont do anything.
Default configuered sendmail leave them there for one houre before diconnecting them. This resulting in Milter Greylist crashing when sendmail try to open more
then 255 connections to the socket for Milter Greylist. 255 is the max amount of open files in solaris 2.8.
When we realised this we tuned Sendmail to disconnect zombies after 2 minutes. (RFC says min is 5 min) Resulting in a much more stabel mail service.
At the peek we did have 32000 zombies disconnected in one houre.
We have also turned of the dumping of the Greylist.db because Milter Greylist did miss mails when it was writing the db.
/Tomas Liljebergh
----- Original Message -----
From: Jonas Israelsson Date: Wednesday, September 5, 2007 19:08 Subject: [milter-greylist] Milter Greylist on a rather busy site > Hello!>
> I am trying to implement milter-greylist at a quite high mail
> volume site. In peak we have about 12 mails a second and a total
> of about 500.000 mails / day.
>
> The greylist daemon seem to last for about 10 minutes or so before
> the following errors pop up on the log..
>
> Aug 31 16:24:38 7800005 sendmail[14741]: [ID 801593 mail.error]
> l7VEOS0D014741: Milter (greylist): timeout before data read,
> where=negotiateAug 31 16:24:38 7800005 sendmail[14741]: [ID 801593
> ;mail.info] l7VEOS0D014741: Milter (greylist): to error state
> Aug 31 16:24:38 7800005 sendmail[14741]: [ID 801593 mail.error]
> l7VEOS0D014741: Milter (greylist): init failed to open
> Aug 31 16:24:38 7800005 sendmail[14741]: [ID 801593 mail.info]
> l7VEOS0D014741: Milter (greylist): to error state
>
> Does this mean the milter daemon simply cant cope ?
>
> In busy hours we have about 400 sendmail children running.
>
> The Machine is a Quad Cpu AMD-64 (extra all) with 4 GB memory
> running Solars 10, and yes I have compiled 64 bit binarys.
>
> Is there anyone out there with experiences using milter-greylist
> in a site with similar volumes ?
>
> Tia.
>
> // Jonas Israelsson
>
>
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