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Date:      Sun, 13 Dec 1998 15:30:45 +0800 (WST)
From:      Dean Hollister <dean@odyssey.apana.org.au>
To:        Rowan Crowe <rowan@sensation.net.au>
Cc:        freebsd-isp@FreeBSD.ORG
Subject:   Re: sendmail morons
Message-ID:  <Pine.BSF.4.05.9812131529240.4741-100000@odyssey.apana.org.au>
In-Reply-To: <Pine.BSF.4.01.9812131806310.4706-100000@velvet.sensation.net.au>

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On Sun, 13 Dec 1998, Rowan Crowe wrote:

> If it's a machine performance issue then you could try limiting the number
> of children:
> 
> # maximum number of children we allow at one time
> O MaxDaemonChildren=30
> 
> If it's for a major mail server then I would _not_ recommend this, as once
> the limit is reached all connections to port 25 will be refused. I had a
> play with this the other day when someone decided to forward 150Mb+ of
> their email from work to their home account, and it was severely loading
> the system.

I would *not* recommend this. It would be better to configure the child
process to exit if the IP is in its db. I vaguely recall something at
www.sendmail.org about it.

> Otherwise, you could ipfw deny the IP [range], or do it at a higher level
> with sendmail as another poster suggested.

Or even better, use smtpd. Then run tcp wrappers above it.

Regards,

d.


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