Prerequisites
Before you start, you’ll need:- A Resend API key
- A verified domain
Guide
Get the Resend SMTP credentials
When configuring your SMTP integration, you’ll need to use the following credentials:
- Host:
smtp.resend.com - Port:
465 - Username:
resend - Password:
YOUR_API_KEY
Integrate with Retool SMTP
Log into your Retool account and create a new SMTP Resource.


- Go to Resources and click Create New

- Search for SMTP and select it

- Add name and SMTP credentials
