DNS Records Required for Email Deliverability

Before sending email, configure these DNS records at your domain registrar:

1. MX Record

Tells the world where to deliver mail for your domain:

• Type: MX | Host: @ | Value: mail.yourdomain.com | Priority: 10

2. A Record for Mail Server

• Type: A | Host: mail | Value: YOUR_SERVER_IP

3. SPF Record

Authorizes your server to send email:

• Type: TXT | Host: @ | Value: v=spf1 ip4:YOUR_SERVER_IP ~all

4. DKIM Record

Cryptographically signs outgoing email. Requires OpenDKIM setup on the server:

apt install opendkim opendkim-tools -y

Follow OpenDKIM configuration to generate keys and publish the public key as a TXT record.

5. DMARC Record

• Type: TXT | Host: _dmarc | Value: v=DMARC1; p=quarantine; rua=mailto:[email protected]

6. Reverse DNS (rDNS / PTR)

Set this in the DartNode dashboard:

1. Go to Network > Reverse DNS.
2. Set the PTR record for your server's IP to mail.yourdomain.com.
3. Wait for propagation (status will change from "Propagating" to "Propagated").

Important: Without proper rDNS, SPF, DKIM, and DMARC records, most email providers will reject or spam-filter your messages.