🔥 Daily Digest: Master Docker, PDF Tricks, and JavaScript Essentials in One Power-Packed Issue

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Daily Issue #68 | Subscribe to DS | Daily Sandbox Pro

This issue is loaded with Docker hacks, PDF tricks, and JavaScript essentials. Here’s the rundown:

• CLI for "Can I Use...": Check browser compatibility right from your terminal.

• Multi-Page View Transitions: Smooth transitions with @view-transition in multi-page apps.

• Next.js with Docker: Run Next.js apps in a Docker container like a pro.

• Postgres with Docker: Easy setup guide for Postgres in Docker.

• DOM Manipulation Mastery: Why vanilla JavaScript still shines for DOM control.

• Coding Toolbox:

  • pdf.js: JavaScript PDF reader by Mozilla.

  • pdftochat: AI-powered tool to chat with your PDFs.

  • pdf-to-podcast: Turn PDFs into podcast episodes.

  • docker-cheat-sheet: All the essential Docker commands in one spot.

• Introducing a CLI tool for "Can I Use ..."

• View Transitions on multi-page apps

@view-transition {
  navigation: auto;
}

• Running Next.js with Docker

• How to Set Up Postgres Using Docker

• Mastering DOM Manipulation in Vanilla JavaScript: Why It Still Matters

More news here →

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Mastering Email Authentication for Reliable Inbox Delivery

Creating a trusted email server that avoids spam folders requires setting up SPF, DKIM, DMARC, and reverse DNS records to authenticate your domain. This guide walks you through the essentials of building a robust, credible setup.

Step 1: Set Up DNS and Identify Server IP

Ensure you have DNS control through your registrar or provider and confirm your mail server’s IP. Assign a hostname like mail.yourdomain.com - key for email authentication.

Step 2: Implement SPF for Sender Authentication

Add an SPF TXT record in DNS to authorize your server’s IP:

v=spf1 ip4:your.mail.server.ip -all

This helps prevent unauthorized senders from using your domain.

Step 3: Configure DKIM for Email Signatures

Generate a DKIM key pair, store the private key on your server, and add the public key as a DNS TXT record:

v=DKIM1; k=rsa; p=YourPublicKey

This verifies email authenticity for recipients.

Step 4: Add DMARC for Policy Enforcement

DMARC enforces your SPF/DKIM settings. Add a DNS TXT record like:

v=DMARC1; p=quarantine; rua=mailto:[email protected]; sp=none

This record helps monitor and secure your domain’s email.

Step 5: Set Up Reverse DNS

Work with your provider to create a PTR record that maps your server’s IP back to its hostname, a step many receiving servers require.

Final Steps: TLS and Testing

Install TLS for encryption and match your HELO/EHLO settings to mail.yourdomain.com. Test emails to major providers, monitor DMARC reports, and use tools like MXToolbox to confirm your setup.

With these configurations, your emails will reach inboxes more reliably.

⭐️ For the full details, check out the full article here

More code snippets here →

• pdf.js - PDF Reader in JavaScript (maintained by mozilla)

• pdftochat - Chat with your PDFs with AI

• pdf-to-podcast - Convert any PDF into a podcast episode!

• docker-cheat-sheet - Docker Cheat Sheet

More code libs here →

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