From owner-freebsd-isp  Sat Dec 12 23:21:54 1998
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	Sun, 13 Dec 1998 01:19:39 -0600 (CST)
From: Kevin Day <toasty@home.dragondata.com>
Message-Id: <199812130719.BAA20156@home.dragondata.com>
Subject: Re: sendmail morons
In-Reply-To: <Pine.BSF.4.05.9812131440360.23872-100000@odyssey.apana.org.au> from Dean Hollister at "Dec 13, 1998  2:41:35 pm"
To: dean@odyssey.apana.org.au (Dean Hollister)
Date: Sun, 13 Dec 1998 01:19:38 -0600 (CST)
Cc: freebsd-isp@FreeBSD.ORG
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> On Sun, 13 Dec 1998, Kevin Day wrote:
> 
> > Somehow, we're on some spam software's list of open relays, I think. We
> > aren't open to relaying, but people sure try. 
> > 
> > I'm guessing this is a bug in the software, but... when it can't relay, it
> > leaves the connection open, then goes and tries again, and again.....
> 
> [snippity]
> 
> > I'll end up with hundreds of these sometimes.. They timeout in 15-20 mins,
> > but my server is thrashing so badly at that point, it's unusable.
> > 
> > Anyone see this? Anyone know what I can do?
> 
> Yes, I added the IP to our local database of blocked ip's. The server
> returns a permission denied error (550).
> 
> > Sendmail is almost always sitting in 'cmd read' or 'child wait'.
> 
> Eventually, it will timeout.
> 
> Regards,
> 
> d.
> 
> 

I block them too, however... I end up with adding 5-10 new addresses a day
this way, and have at times had 500-800 sendmail processes running.

They do time out, but if 4-5 people happen to do this at once, it gets
scary. There has to be a better way. :)

Kevin

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