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by: Chris Coyier
Thu, 10 Jul 2025 11:04:57 +0000


Hi!

We’re back!

Weird right? It’s been over 2 years. 

We took a break after episode 400, not because we ran out of things to talk about, but because we were so focused on our CodePen 2.0 work, it got old not being able to discuss it yet. We’ll be talking plenty about that going forward. But CodePen has a ton of moving parts, so we’ll be talking about all of it. 

This week we’ll be kicking off the podcast again talking about a huge and vital bit of CodePen infastructure: our email system. Outgoing email, that is. We get plenty of incoming email from y’all as well, but this is about the app itself sending email. 

Timeline

  • 00:06 We’re back!
  • 01:22 Our transactional email system
  • 05:21 Templating in Postmark
  • 08:31 Hitting APIs to send emails
  • 10:23 Building a sponsored email
  • 17:20 Marie’s Monday morning routine
  • 24:19 Analytics and metrics
  • 26:55 Dealing with large images
  • 30:12 MGML framework for email

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