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Tag: filters

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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Email filters and small sends

Have you heard about the Baader-Meinhoff effect? The Baader-Meinhof effect, also known as frequency illusion, is the illusion in which a word, a name, or other thing that has recently come to one’s attention suddenly seems to appear with improbable frequency shortly afterwards (not to be confused with the recency illusion or selection bias). Baader–Meinhof […]

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Gmail, machine learning, filters

I’m sure by now readers have seen the article from Gmail “Spam does not bring us joy — ridding Gmail of 100 million more spam messages with TensorFlow.” If you haven’t seen it, go read it. It’s not often companies write about their filtering philosophy and what tools they’re using to manage incoming bad mail. […]

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Filters working as intended

One of the toughest deliverability problems to deal with is when mail is blocked or going to spam because the filters are working as intended. Often the underlying issue is a lack of permission. In the consumer space there are some thing the sender can do to change their metrics and get to the inbox. […]

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