Block people from using those sites? Kick them off your network?
Are these end users doing this? Or do they have bot infected machines using webmail to send spam in an automated fashion? If so then snort+clamav should do the trick. I presume folks run inbound and outbound IDS right? I sure hope so. :) Olufemi Adalemo wrote: > I have rather different anti-spam requirements > For a while now I've been looking for a solution to stop users on a network > sending spam via web-based email like Hotmail, Gmail and Yahoo by scanning > the outgoing HTTP POST command on a proxy server based on Bayesian > statistics like Dansguardian which would have been great if it did POST > scanning, is there anything new out there that fits this description? > > Femi > > ________________________________________ > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Travis Johnson > Sent: 14 July 2009 05:40 > To: sarn...@info-ed.com; WISPA General List > Subject: Re: [WISPA] Re-evaluating our anti-spam solution > > The difference with Postini compared to an in-house box is Postini stops the > incoming SPAM before it uses any bandwidth on our backbone. Last time I > checked (over a year ago), it was saving us 3-4Mbps of traffic (24x7). I > would guess now it's closer to 7-10Mbps of incoming SPAM flow that never > makes it to our network. > > Postini also queues are mail if we ever have a major problem. We had our > email server have a controller failure about a year ago... while we were > fixing it and brining up a new box (4-5 hours), no email was lost or even > bounced because Positni had queued it all up (on 10,000+ email accounts). :) > > Travis > Microserv > > Scottie Arnett wrote: > Agreed! Been using Postfix since I told Postini to take a hike. They both > use a modified version of Postfix and related add-ons. You can make a spam > machine out of the cheapest hardware now. I have been doing this for over 3 > years and have a much better customer satisfaction. > > Scottie > > ---------- Original Message ---------------------------------- > From: Jeremy Parr <jeremyp...@gmail.com> > Reply-To: WISPA General List <wireless@wispa.org> > Date: Mon, 13 Jul 2009 20:25:16 -0400 > > > 2009/7/13 Don Grossman <d...@willitsonline.com>: > > It seems time to take a look at our anti-spam solution. Currently we > are looking to replace out Barracuda due to ongoing issues with the > box that after several attempts to work with Barracuda can not be > resolved. Barracuda is helpful but like to point at other things like > DNS and unrelated stuff. In the end they log into the box after > wasting time so something to kick the box and we are good for an > undetermined amount of time. > > The Barracuda gives us a few features that we like such as an in house > box that we are not paying per email address or domain. Also the per > user configurability is great for letting users independently control > their white and blacklists. > > In a nutshell what products should we look at that offer us similar > features as the Barracuda box. > > You can roll your own with Postfix and a few addons. After looking at > the configuration options for a lot of the Postfix addons, you come to > the realization that with a few hours of work, you can have all of the > software tools used by the Barracuda internally, and have root access > to the box to fix it yourself when it goes south, instead of waiting > on them. You can also throw in things like redundant hard drives, and > redundant power. How a company can market a $3k+ device with a single > IDE drive in good conscience is beyond me. > > I can't find the link right now, but there is a package that provides > users with an accessible, configurable quarantine, just like the > Barracuda. I'll post the link as soon as it turns up. > > > ---------------------------------------------------------------------------- > ---- > WISPA Wants You! Join today! > http://signup.wispa.org/ > ---------------------------------------------------------------------------- > ---- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > --- > [This E-mail scanned for viruses by Declude Virus] > > > > > > Wireless High Speed Broadband service from Info-Ed, Inc. as low as > $30.00/mth. > Check out www.info-ed.com/wireless.html for information. > > > ---------------------------------------------------------------------------- > ---- > WISPA Wants You! 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