Adding Email to Lovable Applications with Keplars

Debojyoti Singha· View GitHub Repository·Mar 5, 2026

Lovable apps need email you actually love.

We've introduced a new Keplars integration for Lovable.dev, making it simple to add reliable, production-ready email functionality without slowing down development or introducing unnecessary complexity.

Lovable is designed to help you build full-stack applications quickly using AI-generated code. Keplars complements this workflow by providing an email infrastructure layer that fits naturally into how Lovable apps are built and deployed.

Email That Fits Your Build Flow:

Modern applications rely on email for critical workflows — onboarding, authentication, notifications, and user communication. Adding email should feel like a natural extension of your product, not a separate system to manage.

With the Keplars integration, email functionality works the same way your Lovable app does:

  • Simple to set up
  • Predictable in behavior
  • Ready for production from day one

You can send emails instantly or schedule them as part of your application logic, without needing to build or maintain a custom backend.

Built on Supabase Edge Functions:

The integration uses Supabase Edge Functions, allowing email logic to run server-side without exposing sensitive credentials or requiring additional infrastructure.

This approach enables:

  • Secure handling of API keys
  • Scalable execution at the edge
  • Minimal setup with production-ready defaults

Developers can deploy a working email system in just a few steps and integrate it directly into their application flows.

Flexible Ways to Send Emails:

Keplars supports multiple ways to create and send emails, depending on your use case:

  • Template-based emails with dynamic variables
  • HTML and plain text emails for full control
  • Scheduled emails for campaigns and workflows
  • Instant delivery for time-sensitive actions

This flexibility allows teams to handle both transactional and marketing emails within the same system.

Pre-Built Components and Hooks:

To simplify development further, the integration includes:

  • Pre-built React components (contact forms, newsletter signup)
  • Custom hooks with loading states and error handling
  • Ready-to-use TypeScript utilities
  • AI prompts tailored for Lovable

These components can be directly added to your project, reducing the time required to build common email-driven features.

Designed for Real Use Cases:

The integration supports common product workflows out of the box:

  • Welcome emails during user signup
  • Contact form submissions
  • Password reset flows
  • Newsletter subscriptions
  • Scheduled email campaigns

Everything is designed to work reliably in production without requiring additional configuration.

Production-Ready from Day One:

Keplars is built with a focus on:

  • Reliable delivery
  • Secure infrastructure
  • Scalable email workflows

From early-stage projects to growing applications, the integration ensures that email functionality remains consistent and dependable as your product evolves.

Getting Started:

To start using Keplars with Lovable:

  • Create a Keplars account and generate an API key
  • Deploy the Supabase Edge Function
  • Integrate the provided components or use direct API calls

Detailed setup instructions are available in the documentation: Keplars Lovable Integration Docs