Introduction
This article shows the steps required to integrate Gravity SMTP with the Resend service. Resend is the best way to reach humans instead of spam folders. Deliver transactional and marketing emails at scale.

Steps To Connect
To allow Gravity SMTP to send messages from your website via the Resend service, you will need to complete the following steps:
- Log in to your Resend account.
- Verify your domain in Resend.
Adding a verified domain to your Resend account is required to prove ownership of the email address and domain used for outgoing messages. You must complete this step before configuring the Resend Integration within Gravity SMTP. Refer to this help guide for instructions on how to complete this step. - Obtain your Resend API key.
This will be required in settings to create the link between Resend and your website via Gravity SMTP. Refer to this help guide for instructions on how to find that API key in your Resend account. - Complete the Gravity SMTP Settings screen.
Go to Gravity SMTP → Settings → Integrations and click the + icon. From the list of available integrations, search and select Resend. This will add it to your integrations and display its settings fields, which you’ll need to complete to finish setup. See this help guide for a description of these settings. - Click the “Save Changes” button.
After saving, you’ll return to the Settings card page, where the new integration card will appear in the list. You can then test using the Gravity SMTP “Send a Test” Tool.
Once the integration is set up, it will be ready for use. You can verify the connection with a test email and send it through Resend when needed.