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The MK Dev & Growth blog

Understand what you're building, before deciding what to build.

Web development, agent-based automation and customer acquisition: articles written to be useful to business leaders and technical teams alike. Every post cites its sources and shows when they were checked.

Web and AI terms explained without unnecessary jargon.

Glossary3 min read

SPF, DKIM and DMARC: what each one does

SPF, DKIM and DMARC are three DNS records that prove an email sent with your domain name really comes from you. SPF lists the servers allowed to send, DKIM signs each message, and DMARC tells the recipient what to do when the check fails — and sends you reports. Since 1 February 2024, Gmail has required at least one of the first two from every sender.

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Glossary2 min read

What is a webhook?

A webhook is a URL you give to a third-party service so it sends an HTTP request to your application as soon as an event happens on its side: a payment collected, a form submitted, an order shipped. It's the opposite of *polling*: instead of querying an API every five minutes to see if there's anything new, you wait to be told.

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