Monthly Archives: January 2019

How much has changed and will change

I was on a call with a client today and they wanted to talk about the handshake agreement about bounce handling I mentioned last week. As I started to really talk about it, I realised how much has changed in the years since that meeting.  It was a bit of the wild west of email […]

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What’s a bounce?

Bounces and bounce handling is one of those topics I’ve avoided writing about for a long time. Part of my avoidance is because there are decades of confusing terminology that hasn’t ever been really defined. Untangling that terminology is the first step to being able to talk sensibly about what to do. Instead of writing […]


How accurate are reports?

One of the big topics of discussion in various deliverability circles is the problems many places are seeing with delivery to Microsoft properties. One of the challenges is that Microsoft seems to be happy with how their filters are working, while senders are seeing vastly different data. I started thinking about reporting, how we generate […]

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Mailbox providers

The other day I tweeted that I often used the term “receivers” to describe receiving MTAs. Whenever I use the term “receivers” to discuss email filters, I think of JD and Madkins telling me that receivers send mail, too. And they do. But I haven’t found a better term for “groups that receive and filter […]

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Reputation is in the eye of the beholder

A few years ago reputation was generally recognised as one thing. If a sending reputation or IP reputation was good in one place it was likely good in other places. Different entities mostly reputation using the same set of signals albeit slightly tweaked to meet their own needs. More recently there is a divergence in […]

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Targets and measures

Over the past few years a number of email delivery products have been launched. Many of these products are intended to improve deliverability by improving metrics. The problem is they don’t work the way their purchasers thing. Take data hygiene services. For the most part, these services take a list of email addresses, do data […]

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It’s a new year, do you know what your filters are doing?

Yesterday the NJABL domain expired. The list was disabled back in 2013 but the domain continued to be maintained as a live domain. With the expiration, it was picked up by domain squatters and is now listing everything. Steve wrote about how and why expired blocklist domains list the world last year. The short version […]

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Welcome 2019

It’s the beginning of a new year and everyone is breaking out posts either reviewing the previous year or making predictions for the next year. I’ve done both over the years. 2018 brought us a couple major things in email. The biggest change was the European General Data Protection Regulations (GDPR) came into effect in […]

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