An Open Letter to Yahoo!‘s Postmaster

In June 2004, Yahoo! and a number of other companies got together to announce the Anti-Spam Technical Alliance or ASTA. While it appears to have been largely silent since then, ASTA did at least publish an initial set of best practices the widespread adoption of which could possibly have had some impact on spam... The majority of these are clearly aimed at ISPs and end users, but some are either generally or specifically relevant to email providers such as Yahoo!, Google or Microsoft... The problem: Since February this year, we have been receiving a significant quantity of spam emails from Yahoo!'s servers. In addition to their transport via the Yahoo! network, all originate from email addresses in yahoo.com, yahoo.co.uk and one or two other Yahoo! domains. Every such message bears a Yahoo! DomainKeys signature... more

In Praise of OpenDNS and a Wii Factoid

If you are not already using OpenDNS on your home network I have one question for you. Why not? When it debuted, OpenDNS' main advantage was speed. It is a great deal faster than the DNS operated by most ISPs so, if you configure your border router/DHCP server to use OpenDNS name servers, the t'internet magically speeds up... On looking at the OpenDNS stats for my home network the other day, one item gave me cause to scratch my head a little. There was a non-trivial number of AAAA look-ups going on. In case you don't know (and I know you do), AAAA look-ups are IPv6 address look-ups... more

Sitefinder Writ Small

You all remember Sitefinder don't you? According to The Register, CentralNic , owner of a number of popular domains including uk.com and us.com, has added wildcard A records to .uk.com. Cue the usual round of sniping about Internet stability (with which, as you will see, I agree). The question is, given the difference in scale (.com and .net are huge; .uk.com is quite small) will anyone notice? And does it matter? Certainly CentralNic seems to think the small scale of their domains excuses or at least mitigates the Internet stability side effects of their ploy. more

Why DomainKeys is Broken

The recent testing by Gmail of DomainKeys affords an opportunity to look again at what the impact of it may be in any attempt to introduce a Domino addin to verify DomainKeys signatures. I have here a sample of an email sent from Gmail and that same email after being delivered to the in-box of a Notes/Domino user who prefers MIME. There are differences which make DomainKeys a real problem at Domino shops (and, I suspect, others). more