From owner-freebsd-isp Wed Mar 8 9:14:35 2000 Delivered-To: freebsd-isp@freebsd.org Received: from buffnet4.buffnet.net (buffnet4.buffnet.net [205.246.19.13]) by hub.freebsd.org (Postfix) with ESMTP id E158E37C4C6 for ; Wed, 8 Mar 2000 09:14:31 -0800 (PST) (envelope-from shovey@buffnet.net) Received: from buffnet11.buffnet.net (buffnet11.buffnet.net [205.246.19.55]) by buffnet4.buffnet.net (8.9.3/8.8.7) with ESMTP id MAA46620; Wed, 8 Mar 2000 12:14:35 -0500 (EST) (envelope-from shovey@buffnet.net) Date: Wed, 8 Mar 2000 12:14:27 -0500 (EST) From: Steve Hovey To: lambert@cswnet.com Cc: freebsd-isp@FreeBSD.ORG Subject: Re: Am I being spammed? Or is egroups this impolite? In-Reply-To: <200003081711.LAA37753@troi.csw.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org 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 , on 03/08/2000 > at 09:45 AM, Tom 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