Email to Slack: threading, Block Kit limits, and the duplicate-post trap

<p>Most multi-tenant SaaS apps that send email do it from one shared identity. There's a <code>notifications@yourapp.com</code>, every customer's mail flows through it, and the

<p>You built an outreach agent, it sent 80 follow-ups this week, and you have no idea what happened to any of them. Did the prospect open the message? Click the demo link? Is the

<p>Day 5 of my 21-day API challenge is done.</p> <p>Yesterday I built a Text Readability Scorer. Today I built an <strong>Email Validator &amp; Disposable Email Checker

<p>Most Playwright suites stop right before the hard part of a signup flow: the "confirm your email" link, the emailed 6-digit code, the password-reset mail. The usual reasons are

<p><em>Three API calls. One template ID that has to carry through all of them.</em></p> <p>Resend's API for sending a templated email is three steps:</p> <ol> <li>Create a

<p>Short answer: put each user reminder on a queue, make the consumer idempotent, retry transient delivery failures with backoff, and move exhausted work to a dead-letter queue

<p>Most "AI email agent" demos end with a triumphant <code>send</code>. The model writes a reply, the code POSTs it, and a real message lands in a real stranger's inbox. That's a

<p>The <strong>Slack Events API</strong> is the part of the platform that lets your app react to what people do in a workspace without polling for it. Where a slash command fires