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Tag: filters

Misinformation on filters

I’ve seen reports that someone is asserting that utm=COVID19 in URLs results in all mail going to bulk at multiple ISPs. This is the type of thing that someone says is true and dozens of folks believe it and thus a “deliverability phact” is born. For a plethora of reasons, this doesn’t pass the sniff […]

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Discussion Session

More than 30 people joined our delivery discussion from last Wednesday evening (Irish time). Thanks to all who joined and participated. I had a number of different topic suggestions, but the thing on everyone’s mind was the current pandemic and how much email many of our customers, clients, and companies are sending. We had what […]

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Troubleshooting: part 3

As I continue to think about how people troubleshoot email delivery I keep finding other things to talk about. Today we’re going to talk about the question most folks start with when troubleshooting delivery. “Did ISP change something?” At least once a week I check some delivery or email fora and some form of the […]

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Same MX, different filters

One of the things I do for clients is look at who is really handling mail for their subscribers. Steve’s written a nifty tool that does a MX lookup for a list of domains. Then I have a SQL script that takes the raw MX lookup and categorizes not by the domain or even the […]

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Troubleshooting delivery problems

Everyone has their own way of troubleshooting problems. I thought I would list out the steps I take when I’m trying to troubleshoot them. Clarify the problem. As a consultant, folks come to me asking me to help them solve their delivery problems. My first step is to get them to clarify what symptoms they’re […]

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Mentally modelling filters

When we talk about filters, we often think there is one filter. But, in many cases there are multiple stages of filters, each examining mail in a different way. In deliverability terms the easiest filters to ignore are the individual user filters. Mostly because there’s nothing we can do about those. These are the baysean […]

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Spam is never timely nor relevant

One of the ongoing recommendations to improve deliverability is to send email that is timely and relevant to the recipient. The idea being that if you send mail a recipient wants, they’re more likely to interact with it in a way that signals to the mailbox provider that the message is wanted. The baseline for […]

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Barracuda update

The Barracuda twitter account has been very helpful and responsive to the issue. A few hours ago they tweeted that the problem should have been fixed. Reports are that listings are resolving and things are getting back to normal. Folks are getting responses to emails to the address provided by Barracuda. 250OK confirms that they’ve […]

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End of an era

A few weeks ago, Return Path announced they were being purchased by Validity, who also own BrightVerify. Last week, they had a round of layoffs. According to sources inside the industry, Validity is closing the New York headquarters and Indianapolis offices and layoffs involved more than 170 staff members. Return Path has been a fixture […]

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Their network, their rules

Much of the equipment and wires that the internet runs on is privately owned, nor is it a public utility in the traditional sense. The owners of the property have a lot of leeway to do what they like with that property. Yes, there are standards, but the standards are about interoperability. They describe things […]

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