Resend has Audiences made up of Contacts. You can send Broadcasts to your Audiences. When adding a Contact, you can assign it an email address and first and last name to personalize your Broadcast to them.

You can add your Contacts to an Audience in three different ways: via API, CSV upload, or manually.

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1. Adding Contacts programmatically via API

You can add contacts to an Audience programmatically. For instance, after someone makes a purchase, you can add them to your “Paying Customers” audience. Resend’s SDKs have support for the contacts endpoint.

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2. Adding Contacts by uploading a .csv

1

Go to Audiences

Go to the Audiences page, and select Add Contacts.

2

Select Import

Select Import CSV.

3

Upload CSV

Upload your CSV file from your computer.

4

Map Fields

After uploading your CSV file, you’re able to map the fields you want to use. Currently, the supported mapping fields are email, first_name, last_name, and unsubscribed.

Finally, select Continue, review the contacts, and finish the upload.

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3. Adding Contacts manually

1

Go to Audiences

Go to the Audiences page, and select Add Contacts.

2

Choose Manual

Select Add Manually.

3

Add Contacts

You can then add either one, or multiple email addresses into the text field, separating multiple email addresses with commas.

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