In today's digital world, email remains a crucial communication tool. But with the rise of spam and phishing attacks, ensuring your emails reach their intended recipients is more important than ever. This is where SPF, DKIM, and DMARC come in. These three essential DNS records work together to authenticate your emails, boosting deliverability and protecting your reputation.
Understanding the Records:
SPF (Sender Policy Framework):This record specifies which servers are authorized to send emails on your behalf. This helps prevent unauthorized emails from being sent from your domain.
DKIM (DomainKeys Identified Mail): This record adds a digital signature to your emails, verifying their authenticity and preventing tampering during transit.
DMARC (Domain-based Message Authentication, Reporting & Conformance): This record tells email providers what to do with emails that fail SPF or DKIM checks. It also provides reporting so you can monitor email authentication and identify potential issues.
The records you need to setup:
The records provided below should be added or updated to your domain DNS records. Please replace YOURDOMAIN.com.au with your website domain name.
DMARC:
- Name: `_dmarc.YOURDOMAIN.com.au`
- Type: TXT
- Value: `v=DMARC1; p=reject`
This record tells email providers to reject emails that fail SPF or DKIM checks, offering the highest level of
protection. If you do not what to reject failed emails then replace p=reject with p=none or p=quarantine.
SPF:
- Name: (Leave blank)
- Type: TXT
- Value: `v=spf1 a mx include:smtp3.nexusdigital.net.au -all`
If you already have an existing SPF record then please add “include:smtp3.nexusdigital.net.au” before the -all. This record authorizes Nexus servers and your domain's mail servers to send emails.
DKIM:
- Name: `nm3._domainkey.YOURDOMAIN.com.au`
- Type: CNAME
- Value: `nm3._domainkey.nsmcloud.com.au`
This record links your domain to Nexus's DKIM signing service, adding the digital signature to your emails.
Your website hosting company or IT support will be able to assist you with this. Adding these records is a simple and crucial step to ensure your email communication is secure and effective.
Updated: 20 February 2024