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How it works

Resend is an email service for sending transactional emails, such as confirmations, receipts, and reminders. Connect Resend to your Zite app to send emails from your own domain when something happens in your app, like a booking, an order, or a form submission. App visitors don’t need their own Resend accounts—your app uses the account you connect. By connecting Resend, you can:
  • Send emails from your own branded name and domain
  • Attach files such as PDFs, invoices, or images
  • Schedule emails for a specific date and time, such as appointment reminders
  • Send the same email to many people at once
  • Add CC, BCC, and reply-to addresses
  • Check whether an email was delivered or bounced
Resend requires your own API key from Resend. Zite doesn’t provide a shared Resend account. Usage is billed through your Resend account.

How to integrate Resend into your app

1

Connect to Resend

Ask Zite to connect your app to Resend in the chat box. Alternatively, click + in the chat box, select Integrations, then choose Resend.Paste your Resend API key when prompted. Resend only shows a key once, right after you create it. If you didn’t save yours, create a new one.
2

Describe your use case

Tell Zite how you want to use Resend in your app. For example, “Email customers a booking confirmation when they book an appointment” or “Send a reminder email one day before each appointment.”Zite checks which domains are verified in your Resend account. If you have one, Zite uses it. If you have several, Zite asks which one to send from.
3

Test and publish

Test your app by doing the action that sends the email, such as making a booking, and check that the email arrives as expected.Click Publish in the upper right corner to deploy your changes and make the Resend integration available in your live app.

Common use cases

With a Resend connection, you can create apps like:
  • Booking Systems: Email customers when they book, and remind them before their appointment
  • Online Stores: Send order confirmations and shipping updates
  • Invoicing Tools: Send invoices, payment confirmations, and receipts with PDF attachments
  • Membership Apps: Send welcome emails and member updates
  • Event Platforms: Send registration confirmations and event reminders

Important notes

  • Verify your domain: Until you verify a domain in Resend, your app can only send emails to the address on your Resend account. Verify your domain in Resend to email customers.
  • Your own API key: Resend doesn’t offer a Zite account option. Resend keys start with re_.
  • Recipients and batches: Each email can go to up to 50 recipients, and your app can send up to 100 emails in one batch. Emails with attachments are sent one at a time.
  • Sending limits: Resend limits how many requests your account can make each second (10 by default), shared across all of your Resend API keys. Very busy apps may need to send emails in batches.
  • Transactional email: Resend is designed for emails triggered by app activity. For newsletters and marketing campaigns, use Mailchimp.
Need help with this integration? Contact support@zite.com.
Last modified on October 8, 2026