January 2015 – The Month in Email

It’s February already! January went fast, right? At WttW, we are gearing up for MAAWG SF later this month — will we see you there?
We started the year with a set of predictions about email. Mostly we think email will continue to be great at some things and not-so-great at other things, and we’ll keep fighting the good fight to make it better.
As always, I’m interested in filters and how spammers continue to work around them to reach the inbox. I also wrote about how the language of an email impacts delivery, and wrote an expanded response to a comment suggesting email filters should be illegal. You can guess where I stand on that (and if you can’t, perhaps you might read more about how email is an inherently malicious traffic stream…)
I also took a moment to point out a trend I’m really enjoying, which is the rise of content marketing (a.k.a. giving customers useful and interesting information they can’t find elsewhere). As I said in the post, I’ll be curious to see how ROI plays out with this strategy.
We also talked about some of the less exciting content we see in email, notably the infamous Murkowski Statement, by which a spammer declares “Nope! Nothing to see over here!”
Steve also pointed out some content shenanigans in the form of hidden preview text, with some additional clarification from the original marketer in the comments.
In industry news, the big story was that Microsoft has partially implemented DMARC for Office365, and was the first to make a public statement about the specific ways they’ve chosen to implement. In my post, I did a walkthrough of a message to illustrate a bit about how this works, which might be useful if you’re trying to wrap your head around DMARC implementations.
We also talked about consolidation in the ESP space, and got a number of comments from readers about who they think might be next. Shortly thereafter, Listcast was acquired by MailerMailer.
Josh noted a few major shutdowns: Yahoo China email services and the AHBL list. The latter explores the challenges inherent in decommissioning a blacklist, and there’s a good discussion in the comments, so you might check it out if you missed that earlier this month.
Josh also pointed to the Salesforce State of Marketing report, which is always a useful set of metrics about how marketers are using email and other channels. It’s definitely worth a read.

MessageSystems Acquires Port25
Email Authentication in a nutshell

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September 2014: The Month in Email

September was another busy month for us, but Steve stepped up and wrote a number of really interesting posts on email history, cryptography, and current technical issues in the email landscape.
We started the month with a look at the various RFCs that served as the technical specifications for developing message transfer protocols in the 1970s. It’s really fascinating to look at the evolution of these tools we use every day 40 years later. We followed up with a second post on the origins of network email, which is a great primer (or refresher) on the early days of email.
Steve’s four-part series on cryptography and email started with an in-depth look at how the industry is evolving with respect to encryption and privacy issues. He then introduced us to Alice and Bob (or reintroduced those of us who have been following the adventures of the first couple of cryptography), and described symmetric-key and public-key encryption. His next post described message signing, and how DKIM is used to manage this. He finished up the series with a post on PGP keys.
In industry news: Spamcop is shutting down its email service. There shouldn’t be any major impact on senders, but the post has some specific notes on DMARC implications. We also noted an interesting mail routing suggestion on Twitter, and wrote a post on using Mail.app for this.
In other DMARC news, we wrote about DMARC and report size limits, which might be useful information, depending on your configuration. We also launched a new DMARC tool to help senders understand who is publishing DMARC. Let us know what you think and if you’re finding it useful.
We couldn’t let a month go by without mentioning filters. We looked at a sector we don’t usually discuss, corporate filtering, and went in-depth on a much-misunderstood topic, content filtering.
Finally, Laura offered a webinar on a favorite topic, deliverability, in conjunction with the AMA and Message Systems. If you missed it, you can watch the recorded version here, or just take a peek at some of the reaction via Twitter.

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Content based filtering

Content filtering is often hard to explain to people, and I’m not sure I’ve yet come up with a good way to explain it.
A lot of people think content reputation is about specific words in the message. The traditional content explanation is that words like “Free” or too many exclamation points in the subject line are bad and will be filtered. But it’s not the words that are the issue it’s that the words are often found in spam. These days filters are a lot smarter than to just look at individual words, they look at the overall context of the message.
ISP_tolerances
Even when we’re talking content filters, the content is just a way to identify mail that might cause problems. Those problems are evaluated the same way IP reputation is measured: complaints, engagement, bad addresses. But there’s a lot more to content filtering than just the engagement piece. What else is part of content evaluation?

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Return Path on Content Filtering

Return Path have an interesting post up about content filtering. I like the model of 3 different kinds of filters, in fact it’s one I’ve been using with clients for over 18 months. Spamfiltering isn’t really about one number or one filter result, it’s a complex interaction of lots of different heuristics designed to answer the question: do recipients want this kind of mail?

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