DNS Setup for Email Domain Verification and Branded Links
Difficulty: 🟡 Intermediate
Time required: 15-30 minutes
Prerequisites:
- Administrative access to your domain’s DNS settings
- Basic understanding of DNS record types
- SendGrid account details from Cast.app support
What you’ll accomplish:
- ✅ Enable sending emails from your custom domain
- ✅ Set up branded links for your presentations
- ✅ Improve email deliverability and trust
Overview
This guide helps you configure DNS records to verify your domain for sending branded emails and create custom links. These settings ensure your emails appear professional and are trusted by recipient email servers.
1. Email Domain Verification
To send emails from your domain using our system, add the following DNS records. These ensure that your emails are secure, authenticated, and trusted.
Required DNS Records
| Type | Host | Value |
|---|---|---|
| CNAME | xxxxx.yourdomain.com | uxxxxxxxx.wxxxx.sendgrid.net |
| CNAME | s1._domainkey.yourdomain.com | s1.domainkey.uxxxxxxxx.wxxxx.sendgrid.net |
| CNAME | s2._domainkey.yourdomain.com | s2.domainkey.uxxxxxxxx.wxxxx.sendgrid.net |
Why These Records Are Important
-
CNAME: xxxxx.yourdomain.com
This connects your domain to SendGrid, authorizing them to send emails on your behalf. -
CNAME: s1._domainkey.yourdomain.com and s2._domainkey.yourdomain.com
These records enable DKIM, which adds a digital signature to your emails, ensuring they haven’t been altered and reducing the risk of being marked as spam.
2. Branded Link Setup
You can create branded links to provide a seamless experience for your users. Add the following DNS record:
| Type | Host | Value |
|---|---|---|
| CNAME | app.yourdomain.com | customapp.web.app |
Why This Record Is Important
This record allows you to use your own domain (e.g., app.yourdomain.com) for links that redirect to our platform (e.g., customapp.web.app), keeping the branding consistent for your users.
How to Add These Records
- Log in to your DNS provider and access your domain’s DNS settings.
- Add CNAME Records using the information provided above.
- Save Changes and wait for DNS propagation (up to 48 hours).
If you have any questions, feel free to reach out to our support@cast.app.