- NZNOG - lists.nznog.org

RE: [nznog] IP / domain blocking for SPAM prevention
by Michael Bordignon 25 Sep '03

25 Sep '03

> So the spammers can see what systems that have to beat to get > their crap through, no thanks. How are others supposed to learn then? trial and error? Michael

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Re: [nznog] IP / domain blocking for SPAM prevention
by david＠farrar.com 25 Sep '03

25 Sep '03

> At 10:38 a.m. 26/09/2003, Claire wrote: > > Actually, at least one ISP in the NZ market already has a > 'Virtual Mail Server' ASP product out there, with Spam > and Content Control features coming in the next few > weeks. Probably an appropriate time for me to mention that one of the activities that the InternetNZ Spam Taskforce is looking at is an easy to access website where ISPs and others can list what spam technologies they use and have available (both at server level and for clients to use). Another aspect may be some sort of guide to commercial solutions. Want to avoid it being an "INZ says this is good or bad" but something where users can rate and review solutions so more people are aware of the limitations of Mail Marshall (as one example) or Mailwasher (great product, but bounce facility is inappropriate as it forges) as another example. Consumers Institute is also looking at doing a survey in the near future, and we may team up with them to do one combined survey. DPF

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Xtra outage?
by Juha Saarinen 25 Sep '03

25 Sep '03

So what was the deal there? The Xtra network status page is indecipherable. No idea what "Period: inactive" means, but it looks like customers in 03, 06, 07 and 09 areas couldn't dial into Xtra. Did this affect other ISPs too? -- Juha Saarinen

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FW: Your e-mail message was blocked
by Richard Parkinson 25 Sep '03

25 Sep '03

I tend to turn all this notification stuff off though, so MM doesn't harass the sender for a legitimate email :) -----Original Message----- From: Actionline(a)med.govt.nz [mailto:Actionline(a)med.govt.nz] Sent: Friday, 26 September 2003 11:42 a.m. To: Richard Parkinson Cc: Frank.March(a)med.govt.nz Subject: Your e-mail message was blocked MailMarshal (an automated content monitoring gateway) has stopped the following e-mail as it may contain Inappropriate Content. Message: B00013e871.00000001.mml From: Richard(a)sigel.co.nz To: Frank.March(a)med.govt.nz Subject: RE: [nznog] IP / domain blocking for SPAM prevention If you believe the above e-mail to be business related please contact Actionline(a)med.govt.nz to arrange for the message to be released to its intended recipients. The blocked e-mail will be automatically deleted after 30 days.

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RE: [nznog] IP / domain blocking for SPAM prevention
by Richard Parkinson 25 Sep '03

25 Sep '03

If in saying "filters" you mean, delivers it to a folder along with hoards of other junk for some poor admin to check to ensure there is no legitimate mail in the pile... Yep. I don't find this a great task though. A quick sort by subject, or sender and you quickly wipe out all the crap, leaving a handful of legitimate emails to let through. This might be a painful task for larger sites such as Massey or an ISP. Cheers, Richard. -----Original Message----- From: Steve Withers [mailto:swithers(a)mmp.org.nz] Sent: Friday, 26 September 2003 10:39 a.m. To: NZ NOG Subject: [nznog] IP / domain blocking for SPAM prevention Further comments on IP and domain blocking for *personal* mail servers: Just checked my maillog from yesterday. 70% of rejected mail connects came from hotmail, yahoo, earthlink and aol. 30% came from the 61.* and 218.* Korean IP spaces 10% was rejected by ordb / relay denied / other blocked domains I have wondered if ISPs want to encourage customers to set up individually customisable mailservers on broadband connections - some sort of appliance - that acts as their mail server. Let the business and competent private users decide what they will and won't receive....with benefits to the ISP in terms of reduced bandwidth consumed as spam isn't deliverable to these people. Just lots of rejected connect attempts. This may even be a managed service an ISP could offer a customer / business. If payment is on data-volume, this could help reduce such charges - offsetting any service fee to some extent. Am I right in thinking Mailmarshall still allows the spam to be delivered? It just filters it. The method above prevents delivery. It would be impossible to do this at ISP level....but it may be a service line an ISP might like to offer a client who wants to define what they do and do not receive. -- Steve Withers <swithers(a)mmp.org.nz> _______________________________________________ NZNOG mailing list NZNOG(a)list.waikato.ac.nz http://list.waikato.ac.nz/mailman/listinfo/nznog

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RE: [nznog] Argghhh.... [Fwd: Your e-mail message was blocked]
by Richard Parkinson 25 Sep '03

25 Sep '03

Happy with MailMarshal here :) Works fine if you put the effort into setting it up properly. -----Original Message----- From: Juha Saarinen [mailto:juha(a)saarinen.org] Sent: Friday, 26 September 2003 10:12 a.m. To: Frank March Cc: ActionLine; nznog(a)list.waikato.ac.nz; Jennifer Mortimer Subject: Re: [nznog] Argghhh.... [Fwd: Your e-mail message was blocked] Frank March wrote: > Although I seldom post to this list (and when I do it is arguably > off-topic on occasions), and most of the traffic is of marginal direct > interest to me, I do find this list useful as a gauge of the > temperature and general health of the Net in NZ which is immensely > valuable for my job. However, if the problem persists, and complaints > persist, I will remove myself from the list. I would regard this as > being a very unfortunate outcome. > > And, by the way, and anticipating a message later in the thread from > Juha, I dont ever recall his swearing at me (about me perhaps....) $&@)#*&$@!!! Did you delete the message??? ;-) No, seriously, use a Hotmail account for the list instead of your MED one. Mail Marshal is a blunderbuss approach for dealing with an admittedly difficult problem and I don't know anyone "protected" by it who is happy with it. There's an important issue here to consider as well: as a civil servant, you presumably need to be accessible to the public. Using a filtering system with a high false positive rate prevents that. Oh hi, Donald. Yes, yes, I know, it's OT for the list... -- Juha _______________________________________________ NZNOG mailing list NZNOG(a)list.waikato.ac.nz http://list.waikato.ac.nz/mailman/listinfo/nznog

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Argghhh.... [Fwd: Your e-mail message was blocked]]
by Steve Withers 25 Sep '03

25 Sep '03

On Fri, 2003-09-26 at 09:39, Frank March wrote: > On average Mailmarshal as configured here seems to catch 50% of genuine spam > 'aimed' at me (but is getting better) and about 25% of the blocking messages > are false positives (despite recent problems with this list, I think this > might also be improving incrementally). Nevertheless, personally, I would > much rather have the spam. The record with virus filtering is, however, > exemplary. I had to stop using the junk filter in Outlook because it decided that ALL mail from my boss was spam. I still don't know why. I don't use any server-based spam detection. Because my mailserver is for our family only I do block entire IP ranges and about 450 domain names. We get perhaps 2 spam e-mails through each day between the 4 of us. However...I block all mail from hotmail, yahoo, aol and a few others. That killed a HUGE amount of dross. Senders get a reject message explaining that their domains are the source of too much spam and would they mind resending from a responsible ISP. This also means I often don't see e-mail from people on mailing lists who use these "junk" domains....though this depends on how the list server is configured. -- Steve Withers swithers(a)mmp.org.nz -- Steve Withers <swithers(a)mmp.org.nz>

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RE: [nznog] Argghhh.... [Fwd: Your e-mail message was blocked]
by Simon Lyall 25 Sep '03

25 Sep '03

On Fri, 26 Sep 2003, Frank March wrote: > On average Mailmarshal as configured here seems to catch 50% of genuine spam > 'aimed' at me (but is getting better) and about 25% of the blocking messages > are false positives (despite recent problems with this list, I think this > might also be improving incrementally). Nevertheless, personally, I would > much rather have the spam. The record with virus filtering is, however, > exemplary. A 25% false positive rate for Spam is bad to the point of being incompetent. Anything worse than a 1% FP rate except where someone is specifically after "aggressive" filtering is very bad. That sort of rate forces people to constantly check their spam folders (I assume they can) to find incorrectly identified email. I'd hate to think how many important emails are being lost. Blocking just 50% of spam isn't very good either, especially considering the amount of legit email dropped. I would guess it's another case of the govt paying peanuts and getting monkeys. Probably they have just installed the software "out of the box" rather than engaging brain and actually trying to set it to the appropriate level for the site. -- Simon J. Lyall. | Very Busy | Mail: simon(a)darkmere.gen.nz "To stay awake all night adds a day to your life" - Stilgar | eMT.

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California cracks down on spam
by Barry Murphy 24 Sep '03

24 Sep '03

"California will prohibit Internet advertisers from sending unsolicited emails under the toughest law of its kind in the United States, providing for fines of up to $1-million (about R7-million). Governor Gray Davis signed legislation this week that targets not only the firms that package and send spam to consumers, but also the companies whose products and services are being advertised" I especially like the last setence above. full story at: http://www.iol.co.za/index.php?click_id=79&art_id=vn20030925032433274C67959… Barry

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Nokia Firewall Appliance Specials
by Steve Rielly 24 Sep '03

24 Sep '03

Hi All, We are offering for sale, the following brand new, unused, equipment with full warranties, at heavily reduced prices, as a result of a cancelled order. You may already have one of these Nokia security appliances installed, and at the reduced price may be interested in purchasing a second unit as a spare. Alternatively, with the new Check Point Express licenses offering high availability (HA) software at reasonable prices, you may wish to consider installing a second firewall for HA using one of these appliances We have not put prices on them we are looking for offers on the equipment starting at 50% of their normal RRP. The products are... Nokia BIG-IP HA+540 Firewall Appliance Nokia BIG-IP 5000 Firewall Appliance Nokia IP440 Firewall Appliance Nokia IP330 Firewall Appliance Nokia IP71 Firewall Appliance We are offering the appliance hardware only and not the Check Point software licenses that go with them. These will need to be purchased through the normal channels, or we can provide a quote for you. Please email your offers to steve.rielly(a)extranet.co.nz The highest or any offer may not necessarily be accepted. Cheers, Steve Rielly Security Engineer Extranet Technologies Limited Level 1, 60 Cook St, Auckland, New Zealand P.O. Box 7726, Wellesley Street, Auckland, New Zealand Ph: +64 9 3771122, Mob: 025 835530 Fax: +64 9 3771109

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