macOS Native

Send email from your custom domain for free.

Stop paying monthly fees for Google Workspace or Outlook. JustSend lets you use your own domain to send professional emails directly from your Mac using the Resend API.

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Professional Email, No Subscription

Get all the benefits of a custom email address without the recurring costs.

Rich Email Composer

Full HTML support with formatting, or write in plain text. Create beautiful emails effortlessly.

Multiple Accounts

Manage different sender identities and switch contexts in seconds.

Attachments

Send files up to 40MB. Supports images, documents, and archives.

Email History

Track all sent emails. Check delivery status and review past communications.

Secure & Local

All emails and API keys are stored locally on your device. Note: Data cannot be retrieved later if the app is deleted.

Signatures

Create Custom HTML signatures for consistent branding across your emails.

See JustSend in Action

A clean, intuitive interface designed for productivity.

Compose Email

Compose Emails

Rich HTML editor with formatting tools and plain text support.

Sent History

Email History

Track all your sent emails and check delivery status.

Multiple Accounts

Manage Accounts

Switch between multiple sender identities effortlessly.

Help & Support

Built-in Help

Quick access to documentation and setup guides.

Simple Workflow

  • 01

    Get Your Free Key

    Sign up for free at resend.com (3000 emails/month free) and get your key.

  • 02

    Connect Your Domain

    Add validation records to your DNS provider to authorize your domain.

  • 03

    Start Saving

    Send professional emails from your custom domain for a fraction of the cost.

  • 04

    Start Sending

    Compose rich emails, attach files, and send confidently through the Resend network.

💡 Pro Tip: JustSend is a dedicated sender client. For receiving emails on your custom domain, simply route them to your Gmail inbox.

We recommend Cloudflare Email Routing (Free). Read the setup guide →
NOTE
JustSend is for sending only.

For receiving, we recommend using a service to route incoming emails to your Gmail inbox.