Vibe Coding Email: How to Add Email to Your Project

You've been vibe coding for a few weeks. Your SaaS has a sign-up page, a dashboard and a pricing page, and most of it works. Then Claude Code says something like "you'll need to set up a transactional email service," and the momentum stalls.

This guide covers vibe coding email from that moment on: why it comes up, the options you have, the quickest way to get set up, and what to say to Claude Code once you're connected. It's written in plain English, without developer jargon, for people who build by describing what they want.

A quick definition first. Vibe coding is building software by telling an AI what you want in everyday language, rather than writing the code yourself. AI researcher Andrej Karpathy coined the term in February 2025, and Collins Dictionary named it its Word of the Year for 2025.

When does email come up when you're vibe coding?

Email shows up the moment your project needs to reach real people while you're not around. These are the most common triggers:

These are transactional emails: messages your project sends automatically because someone did something. They're different from newsletters and promotions, which go out to a list. Our guide to transactional vs marketing email covers the difference, and 12 transactional emails every SaaS needs has the full list.

Your project can't send these well on its own. Reliable sending needs mail servers, a good sending reputation, and records that prove the email really comes from you. That's why Claude Code points you to a service. If the term is new to you, here's what a transactional email service does.

What are your options for sending email?

You have three realistic options. Here's what each one is like once real users arrive.

The first two are fine for trying things out. For a project with real users, you'll want a transactional email service.

Most of those services are built for developers. They suit people who write code or want to edit code themselves, and their dashboards and help pages assume that background. SimpleSends is a transactional email service built for people who build with Claude Code but don't write code.

What's the quickest vibe coding email setup?

The quickest route is to connect an email service to Claude Code and let Claude Code do the building. Setting up SimpleSends takes four steps:

1. Sign up on the SimpleSends website and follow the steps there to set up the address you'll send from. To send from your own domain, that includes adding a few DNS records where your domain is registered. DNS records are small settings that tell the internet facts about your domain, such as which services may send email for it. You can't sign up inside the Claude Code chat.
2. Add SimpleSends as a connector. In Claude Code, open Customize, then Connectors, choose Add, then Add custom connector. Fill in these two fields:

3. Log in when prompted. When Claude asks you to connect, log in to SimpleSends.
4. Tell Claude Code you're connected.

I've connected SimpleSends for all transactional email.

Claude Code takes it from there, including adding what your project needs to send email.

A connector is how Claude Code talks to another service. This one uses MCP (Model Context Protocol), an open standard for connecting AI tools to other services.

Here's what Claude Code adds, and why. When your SaaS is live and a customer asks for a password reset at 3am, Claude Code isn't involved. Your live project sends that email through SimpleSends directly. To do that, it needs a secret key (an API key, a kind of password your project uses to prove it's allowed to send) and a small piece of sending code. Claude Code adds both. The connector is for building: setting things up, sending test emails and checking what went out.

For a longer walkthrough, see how to send emails from Claude Code.

What should you tell Claude Code?

Once you're connected, brief Claude Code the way you'd brief a person: say what you want, who it's for and what good looks like. These four messages cover most projects.

Plan the set.

Look through my project and list the emails it should send, when each one goes out and who gets it. Don't build anything yet. I'd like to review the list first.

You'll get a plan to approve or change. Our guide to which transactional emails your SaaS needs explains what usually makes the list.

Design and write them.

Start with the welcome email. Keep it short and friendly, use our brand colors, and include one button that takes people to their dashboard. Show me a preview before you build it in.

Expect a preview you can comment on, then the rest of the emails in the same style.

Test before anyone else sees them.

Send a test of every email to hello@yourcompany.com so I can check them on my phone.

Test emails can go out from the chat. Real ones go out from your live project.

Sort out problems.

A customer says they never got their password reset email this morning. Can you check whether it went out and tell me what happened?

Claude Code can read send logs and delivery status through SimpleSends, so it can tell you whether the email went out and help work out why it didn't arrive.

Want more ideas? We've collected 20 things to tell Claude Code to set up your SaaS emails.

What does email look like after that?

Changes become a message in the chat. A friendlier subject line, a new logo, a reminder three days before a trial ends: ask Claude Code, check the preview, and it updates the email. You don't need a dashboard for day-to-day work.

SimpleSends is built around that way of working. The sign-up, the connect steps and the help are written in plain English, and after one sign-up, everything else happens in your conversation with Claude Code.