# Resend a 10DLC brand email authentication in AWS End User Messaging SMS
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The email authentication is sent from **noreply@auth.campaignregistry.com** and we recommend you add the email address to your spam list allow rules.

The link in the email authentication is valid for 7 days. Follow these directions if it has been less than 30 days since you submitted for 10DLC brand registration. If it has been longer than 30 days you need to [discard the registration](registrations-discard.md#registrations-discard.title) and resubmit it. 

**Resend authentication email**

1. Open the AWS End User Messaging SMS console at [https://console.aws.amazon.com/sms-voice/](https://console.aws.amazon.com/sms-voice/).

1. In the navigation pane, under **Configurations**, choose **Registrations**.

1. Choose the 10DLC brand registration that you need to resend the 2FA email for.

1. Choose resend email in the banner.