Date: Wed, 8 Mar 2000 12:14:27 -0500 (EST) From: Steve Hovey <shovey@buffnet.net> To: lambert@cswnet.com Cc: freebsd-isp@FreeBSD.ORG Subject: Re: Am I being spammed? Or is egroups this impolite? Message-ID: <Pine.BSF.4.05.10003081213490.20855-100000@buffnet11.buffnet.net> In-Reply-To: <200003081711.LAA37753@troi.csw.net>
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You can set max connections per minute in sendmail, max children total, etc to minimize the impact of jerk sites like egroups. On Wed, 8 Mar 2000 lambert@cswnet.com wrote: > In <Pine.BSF.4.05.10003072159250.4553-100000@misery.sdf.com>, on 03/08/2000 > at 09:45 AM, Tom <tom@sdf.com> said: > > > >On Tue, 7 Mar 2000 lambert@cswnet.com wrote: > > >> Hi, > >> > >> I have an immediate problem wherein I am seeing a heinous number of > >> sumultanious connects claiming to be from egroups.com. > >> > >> This barrage has brought both my MX servers to their knees. > > > EGroups sends e-mail to a mailing list sorted by domain. They use > >Qmail, so they send to one recipient per connection. So if you have a > >100 people at your domain get EGroups e-mail, in a short period of time, > >EGroups will open a 100 connections to your mail server(s). Hopefully you > >can handle it. This results in a EGroups cutting a swath through the > >internet every time they do a mailing. > > I had 35 open connections from egroups to my primary MX for over 30 minutes. My secondary MX had over 30 connections from egroups at the same time. Is this a case of a clueless admin at egroups? Or are they just assuming that everyone else has 3 C-Classes of MX hosts also? I only have 20K mailboxes. > > > You should probably set your maximum connection limit to something that > >your servers can handle. Switching from Sendmail to Postfix should help. > > I was running out of file handles : > > /tmp/RxB37043: Too many open files in system > > So I guess I'll have to rebuild the kernel. I'll take this as an oportunity to upgrade from Jun 30 3.2-STABLE. > > I'm still a newbie BSD admin. I've only been immersed in *nix for the last 18 months (working my way through a backlog of stuff, 2.1.6, that should have been done a long time ago). I'm still not confident enough of my ability to convert a production box to Postfix without making a lot of customers mad. Fortunately, this is my next priority item. > > -- > Scott Lambert > lambert@cswnet.com > Systems and Security Administrator > CSW Net, Inc. > ================================================================ > Written: Wednesday, March 08, 2000 - 09:45 AM > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-isp" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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