Size isn't the only metric

MarketingSherpa has a case study up today about a company that took an aggressive stance on re-engagement that reduced their house list size by over 95%. While the size of the list went down, online sales doubled.
The whole article is a lesson in how to do email right. They are sending relevant and engaging mail to their subscribers. They kept the addresses of people who wanted the mail, but designed a new program from the ground up. All of the key points I, and others, keep talking about is present in their new program.

  • they had a defined content strategy
  • they had permission to send
  • they sent consistently
  • they sent engaging emails
  • they maintained their lists aggressively

In short, they provided a valuable set of emails that their recipients wanted effectively. And with a list 25% of the size of the unengaged list they started with, they have doubled online sales.

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Public reputation data

IP based reputation is a measure of the quality of the mail coming from a particular IP address. Because of how reputation data is collected and evaluated it is difficult for third parties to provide a reputation score for a particular IP address. The data has to be collected in real time, or as close to real time as possible. Reputation is also very specific to the source of the data. I have seen cases where a client has a high reputation at one ISP and a low reputation at another.
All this means is that there are a limited number of public sources of reputation data. Some ISPs provide ways that senders can check reputation at that ISP. But if a sender wants to check a broader reputation across multiple ISPs where can they go?
There are multiple public sources of data that I use to check reputation of client IP addresses.
Blocklists provide negative reputation data for IP addresses and domain names. There are a wide range of blocklists with differing listing criteria and different levels of trust in the industry. Generally the more widely used a list the more accurate and relevant it is. Generally I check the Spamhaus lists and URIBL/SURBL when investigating a client. I find these lists are good sources for discovering real issues or problems.
For an overall view into the reputation of an IP address, both positive and negative, I check with senderbase.org provided by Ironport and senderscore.org provided by ReturnPath.
All reputation sources have limitations. The primary limitation is they are only as good as their source data, and their source data is kept confidential. Another major limitation is reputation sources are only as good as the reputation of the maintainer. If the maintainer doesn’t behave with integrity then there is no reason for me to trust their data.
I use a number of criteria to evaluate reputation providers.

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The secret to fixing delivery problems

There is a persistent belief among some senders that the technical part of sending email is the most important part of delivery. They think that by tweaking things around the edges, like changing their rate limiting and refining bounce handling, their email will magically end up in the inbox.
This is a gross misunderstanding of the reasons for bulk foldering and blocking by the ISPs. Yes, technical behaviour does count and senders will find it harder to deliver mail if they are doing something grossly wrong. In my experience, though, most technical issues are not sufficient to cause major delivery problems.
On the other hand, senders can do everything technically perfect, from rate limiting to bounce handling to handling feedback loops through authentication and offer wording and still have delivery problems. Why? Sending unwanted mail trumps technical perfection. If no one wants the email mail then there will be delivery problems.
Now, I’ve certainly dealt with clients who had some minor engagement issues and the bulk of their delivery problems were technical in nature. Fix the technical problems and make some adjustments to the email and mail gets to the inbox. But with senders who are sending unwanted email the only way to fix delivery problems is to figure out what recipients want and then send mail meeting those needs.
Persistent delivery problems cannot be fixed by tweaking technical settings.

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How not to build a mailing list

I mentioned yesterday one of the major political blogs launched their mailing list yesterday. I pointed out a number of things they did that may cause problems. Today, I discovered another problem.
This particular blog has been around for a long time, probably close to 10 years. It allows anyone to join and create their own blogs and comment with registered users. As part of their new mailing list, they added everyone who has ever registered to their mailing list. They did not send a “we have a new list, want to join it?” email, they added every registered user to the list and said “you can opt out if you want.”
This is such a bad idea. My own account was used once, to make one comment, back in 2005. Yes, 2005. It’s been almost 5 years since I last logged into the site. Sure, I have email addresses that go back that far, but not everyone does. That list is going to be full of problems: dead addresses, spamtraps, duplicates, unengaged and uninterested.
Seriously, they’re adding people who’ve not logged into their site in 5 years to a mailing list. How can this NOT go horribly wrong?
My initial thought was this was going to blow up in a week. I’m now guessing they’ll start seeing delivery problems a lot sooner than that.

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