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Tracking link maths

galaxy

How long does a tracking link need to be?

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There’s text and then there’s text

If you want to send someone an email with some text in it there are quite a few different ways you can do it. The main differences are the ways the text is packaged up in MIME entities to be sent.

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Your bounce classification is a bit rubbish

When a mailbox provider rejects or defers an email it sends back a message explaining why.

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Do we care about SPF alignment?

SPF and DKIM are the two main ways we associate a domain name with a stream of email in an authenticated way. We can choose the DKIM signing domain fairly freely – we can choose any domain or subdomain we control and put it in the d= field of the DKIM signature. But our choice for the SPF domain is more constrained.

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Comparing DKIM keys

Sometimes we have a client who has done something wrong when setting up authentication. Their DKIM signing fails due to something being wrong with the public key they’ve published.

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The Future of Deliverability

There always seems to be appetite from folks to read the tea leaves and follow up with predictions about what the future holds. I mean, how many folks in the US are obsessively refreshing polls for the last few weeks? (American’s: don’t forget to vote on Tuesday!)

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No, Gmail did not just break all open tracking

I was avoiding commenting on the email open tracking bad take that seems to be going viral round the more gullible corners of LinkedIn.

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DNS Failures

We use DNS a lot in email, particularly for authentication, so diagnosing why DNS isn’t returning what we expect it to is a pretty common challenge. And DNS responses aren’t exactly the clearest thing to understand.

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The Economics of Cold Outreach

It’s time we talk about cold outreach mail. In the last 2 years the volume and aggressiveness of cold outreach mail seems to have exploded. There are dozens of companies out there who are selling services to companies to facilitate cold outreach. My own sales mailbox is full of requests from companies to help them solve their delivery problems.

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Bears and Spam Filters

“Why is my inbox full of spam, while I still can’t get the mail I send into the inbox reliably?” — most email marketers at some point in their career.

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