# SendGrid email

> Authenticate your domains in SendGrid and add your SendGrid API key so your platform can send emails from your own domains.

- URL: https://kb.voipcloud.online/au/partners/wholesale/sendgrid-email/
- Section: Partners › Wholesale voice
- Type: guide
- Applies to: All countries
- Last reviewed: 2026-11-09

Your wholesale platform sends emails to customers through SendGrid. Every wholesale partner must add their SendGrid API key and verify every domain used to send email.

## Before you start

- A SendGrid account. If you don't have one, sign up on the SendGrid website.
- Access to the DNS settings of every domain you send email from. Verify all of these:
  - billing domains;
  - SMTP sending domains;
  - email address domains;
  - PBX domains.

## 1. Authenticate each domain in SendGrid

Repeat these steps for each domain. SendGrid's menus change from time to time; if a step looks different, follow SendGrid's own domain authentication guide.

1. In SendGrid, open **Sender Authentication** and start authenticating a domain.
2. If SendGrid asks for your DNS host, leave it empty. Don't turn on link branding.
3. Enter your domain exactly as you send email from it. `www.domain.com` and `domain.com` are two different domains.
4. SendGrid shows the DNS records to add: three CNAME records and a recommended DMARC record. Add the three CNAME records to your domain's DNS. The change can take 1 to 2 hours.
5. If your domain already has a DMARC record, leave it as it is. If not, add the recommended DMARC record.
6. Click **Verify** in SendGrid.

## 2. Add your SendGrid API key

1. In SendGrid, create an API key and copy it.
2. In your wholesale portal, go to **Settings** › **Global Configuration** and select **Mail**.
3. Double-click **SendGrid API Key**, paste the key as its value and click **Update**.

## Check it works

- In SendGrid, each domain shows as verified.
- Send a test email from the platform, such as a password reset for a test customer, and check it arrives.

## Next steps

- [Global configuration](https://kb.voipcloud.online/au/partners/wholesale/global-configuration/): check the email addresses in the **Mail** group.
- [Send customer emails from your domain (DKIM)](https://kb.voipcloud.online/au/partners/email-domain-dkim/): how your resellers verify their own domains.