How to Change DNS Settings at Telenet: Set Up DMARC, SPF & DKIM

February 24, 2025 · DMARC Analyzer Pro

Guide to managing DNS records for domains hosted at Telenet, one of Belgium's major ISPs. Learn how to add DMARC, SPF, and DKIM for email protection.

Introduction

Telenet is one of Belgium's largest telecommunications companies, serving millions of customers with internet, television, and hosting services. Many Belgian businesses and individuals have their domains registered or hosted through Telenet's infrastructure. If you are a Telenet customer with a domain, securing your email with DMARC, SPF, and DKIM records is an important step to prevent spoofing and phishing attacks.

This guide provides detailed instructions for managing DNS records through Telenet's customer portal. Since Telenet is primarily an ISP, their DNS management interface differs from traditional hosting providers, so we will cover the specifics.

Understanding Telenet's DNS Setup

Telenet offers domain registration and basic DNS management as part of their hosting packages. Depending on your subscription type, you may access DNS management through Telenet's business portal or through a partner control panel. Some Telenet hosting plans use a cPanel-based interface, while others use Telenet's proprietary management portal.

Before making changes, check your current email authentication status using the free DNS Checker at https://dmarcanalyzer.pro/tools/dns-checker. This will tell you which records are already in place.

Step 1: Access Your Telenet Hosting Control Panel

If you have a Telenet Business hosting package, navigate to the Telenet Business portal at https://business.telenet.be and sign in with your Telenet business credentials. For standard hosting, go to your hosting control panel (the URL is typically provided in your welcome email from Telenet). Look for "Hosting" or "Webhosting" in your account overview, then click "Manage" or "Beheren" to open your hosting control panel.

Step 2: Find the DNS Zone Editor

In the control panel, look for "DNS Zone Editor", "DNS Management", or "Zone Editor" under the "Domains" section. If you are using a cPanel-based interface, click on "Zone Editor" in the Domains section. The DNS editor shows all current records for your domain. Take note of any existing TXT records, especially those related to SPF.

Step 3: Add Your SPF Record

Click "Add Record" or the "+" button to create a new DNS record. Select "TXT" as the record type. Enter @ or leave the name field blank for the root domain. In the record data field, enter your SPF record: v=spf1 include:_spf.telenet.be ~all (adjust the include based on your actual mail servers).

If Telenet manages your email, their specific SPF include may vary. Check Telenet's support documentation or contact their business support for the exact SPF include domain. If you also use external email services like Google Workspace or Microsoft 365, include those too: v=spf1 include:_spf.telenet.be include:_spf.google.com ~all.

Validate your SPF record after saving with https://dmarcanalyzer.pro/tools/spf-checker to ensure it is correctly formatted and does not exceed the 10 DNS lookup limit.

Step 4: Add Your DKIM Record

To add DKIM: Click "Add Record" and select "TXT". In the name field, enter your DKIM selector followed by ._domainkey (e.g., default._domainkey). Paste the DKIM public key provided by your email service in the record data field. Click Save.

If Telenet manages your email, contact their support to request DKIM signing be enabled and to obtain the correct DKIM public key for your DNS. Many ISP-based email services are now offering DKIM by default -- check your email settings in the Telenet portal.

Step 5: Add Your DMARC Record

Click "Add Record" and select "TXT". In the name field, enter _dmarc. In the record data field, enter: v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.be; adkim=r; aspf=r. Click Save to create the record.

Use the DMARC Record Builder at https://dmarcanalyzer.pro/tools/dmarc-builder to customize your record. You can set reporting frequency, forensic report options, and alignment modes to match your specific requirements.

Step 6: Verify Your Configuration

Telenet DNS changes may take up to 24 hours to fully propagate, though most changes take effect within a few hours. Verify your records at https://dmarcanalyzer.pro/tools/dns-checker. If any record is not showing up after 24 hours, contact Telenet's technical support as there may be additional configuration needed on their end.

What If Telenet Does Not Support DNS TXT Records?

Some older Telenet hosting plans may have limited DNS management capabilities. If you find that you cannot add TXT records through Telenet's interface, you have several options: Contact Telenet business support and ask them to add the records on your behalf. Consider pointing your domain's nameservers to a DNS provider like Cloudflare (free plan available) which gives you full DNS management. Alternatively, transfer your domain to a registrar with more comprehensive DNS tools while keeping your hosting at Telenet.

Monitor and Improve with DMARC Analyzer Pro

After your DNS records are configured, start monitoring your email authentication results with DMARC Analyzer Pro (https://dmarcanalyzer.pro). The platform collects DMARC reports from every email server that receives messages from your domain, giving you complete visibility into your email ecosystem. You will be able to see every source sending email as your domain, track authentication pass rates, and receive alerts when something changes.

For Belgian businesses especially, DMARC compliance is becoming increasingly important as EU regulations around digital communications tighten. Start your free trial at https://dmarcanalyzer.pro/register and take control of your email security today.

Conclusion

Configuring DMARC, SPF, and DKIM at Telenet requires navigating their hosting control panel, which varies depending on your subscription type. While the interface may be different from dedicated hosting providers, the process of adding TXT records follows the same principles. Protect your domain now and monitor it continuously with DMARC Analyzer Pro at https://dmarcanalyzer.pro.