For email usage, abuse reporting requires cooperation between senders and receivers. That's why RFC 5965 specified a standard format for it. However, Wikipedia lists only 18 feedback providers today. It is often said that the number of legitimate mailbox providers in the world is rather small, possibly some hundreds of thousands, but certainly more than that. more
In my last post I blogged about greylisting, a well-known anti-spam technique for rejecting spam sent by botnets. When a mail server receives a an attempt to deliver mail from an IP address that's never sent mail before, it rejects the message with a "soft fail" error which tells the sender to try again later. Real mail senders always retry, badly written spamware often doesn't. I found that even though everyone knows about greylisting, about 2/3 of IPs don't successfully retry. more
Greylisting is a hoary technique for rejecting spam sent by botnets and other poorly written spamware. When a mail server receives an attempt to deliver mail from a hitherto unseen sending host IP address, it rejects the message with a "soft fail" error which tells the sender to try again later. Real mail software does try again, at which point you note that the host knows how to retry and you don't greylist mail from that IP again. more
Signing Email is now a Draft Standard! Signing email transitioned from a proposed standard to a draft standard (RFC6376 -- one of the new RFCs) over at the IETF a few days ago. The other is RFC6377. Let's go through a brief history of DKIM RFCs to refresh our memories... more
How large is your digital footprint? If you pulled together your email account, web site, blog, social networking accounts, and every other virtual identity you have online, just how well known are you on the Internet? Have you ever stopped to consider what happens to your online identity when you die? How would your online friends know? What would happen to your accounts and your content? more
I visited Judge Fogel's courtroom this morning to listen to the oral motions in the Holomaxx cases. This is a general impression, based on my notes. Nothing here is to be taken as direct quotes from any participant. Any errors are solely my own. With that disclaimer in mind, let's go. more
The best part is ... this isn't one of those 'now that I've got your attention' tricks, like one of those old "free beer" posters; there really is a ton of stuff happening above the 49th parallel this summer. To begin with, as a precursor to Canada's Anti-spam Law coming into effect later this year, the Office of the Privacy Commissioner, the Canadian Radio-television Telecommunications Commission, and Industry Canada have all issued regulations, the latter two in draft form with an RFC. more
Last week, Synacor joined other major mailbox providers by introducing a complaint feedback loop service -- powered by ReturnPath. This increases the number of public complaint feedback loops available today across the internet. more
In our last instalments we discussed the various ways to encode non-ASCII character sets, of which UTF-8 is the winner, and some complex approaches that tried to make UTF-8 mail backward compatible with ASCII mail. After years of experiments, the perhaps surprising consensus is that if you're going to do international mail, you just do it. more
In our last installment we discussed MIME, Unicode and UTF-8, and IDNA, three things that have brought the Internet and e-mail out of the ASCII and English only era and closer to fully handling all languages. Today we'll look at the surprisingly difficult problems involved in fixing the last bit, internationalized e-mail addresses. more
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