*Important: Make sure you have created Resend account ( https://resend.com ) to use this add-on. After signing up, you need to set up your email domain and create API Key there, so you can use that API Key with our add-on. That's why we can offer one-time fee instead of subscription. Refer to our getting started article: https://emailsheets.com/guides/getting-started/ * Sheets add-on to enable you send email directly in spreadsheet using formula. Use =EMAIL(from, to, subject, body) to send text-based email. We also support HTML with =EMAIL_HTML(). You can also check the email delivery status with =CHECK_STATUS() Buy the lifetime license once, and then use forever with your Resend API Key. Use it to send transactional emails. Simplest alternative to MailMerge.