As an agency, you’ve probably experienced situations where a client’s website suddenly goes offline, emails aren’t being delivered, or tracking data is missing. Often, the problem isn’t with the website itself, but with the basics: domains, DNS, SSL certificates, and proper email configuration. Staying on top of these issues and setting up processes properly not only saves you a lot of stress but also boosts client satisfaction and efficiency.

In this post, we’ll explain what really matters when it comes to domain and infrastructure management, and provide practical tips on how to set everything up reliably—whether you’re just getting started or already managing many clients.

1. Understanding DNS: The Foundation of Every Domain

DNS, the Domain Name System, is like a phone book for the Internet. It translates domain names into IP addresses so that browsers, mail servers, and other services know where to send their requests. Incorrect entries can quickly cause websites to go offline or emails to fail to deliver.

The Most Important DNS Records for Agencies

• A Record: Links the domain to an IPv4 address of the web server.
• AAAA record: Same as an A record, but for IPv6 addresses.
• CNAME (Canonical Name): Redirects a subdomain to another domain, e.g., shop.meineagentur.de → shopanbieter.com.
• MX Record: Determines which server receives emails for the domain.
• TXT record: Contains text information for security and verification purposes, such as SPF, DKIM, or Google verifications.
• SPF Record (Sender Policy Framework): Defines which servers are authorized to send emails on behalf of the domain.
• DKIM (DomainKeys Identified Mail): Cryptographically signs outgoing emails to ensure authenticity.
• DMARC (Domain-based Message Authentication, Reporting & Conformance): Specifies how email servers should respond to failed SPF/DKIM checks and provides reports.

Tip: Create a documented DNS template for each domain that includes all the important entries. This will allow you to set up new customers or subdomains quickly and without errors.

Note: The examples for SPF, DKIM, and DMARC are simplified illustrations. You must always adapt them to your email provider and domain structure; otherwise, email delivery will not work reliably.

2. SSL Certificates: Security and Trust

SSL/TLS certificates encrypt data traffic between the browser and the server and ensure that no one can intercept or tamper with the data. HTTPS is a must these days—not only for security, but also for SEO and to build trust with your visitors.

What Agencies Need to Know

• Certificate Types:
  • DV (Domain Validation): Verifies only the domain. Fast and often free (e.g., Let’s Encrypt).
  • OV (Organization Validation): Verifies the organization behind the domain.
  • EV (Extended Validation): Highest level of trust; displays the company name in the browser.
• Automatic renewal: Let’s Encrypt certificates are valid for only 90 days. Use tools or reseller interfaces with auto-renewal to ensure that certificates do not expire.
• Wildcard certificates: Secure all subdomains at once, e.g., *.meineagentur.de.
• Monitoring: Monitor expiration dates and configurations to ensure that no website suddenly displays a security warning.

Bonus tip: SSL protects not only websites but also mail servers. Many providers require TLS-encrypted transmission; otherwise, emails end up in the spam folder.

3. Securing Your Email Properly

Email issues are one of the most common causes of complaints. Even minor errors with SPF, DKIM, or DMARC can cause newsletters to end up in the spam folder or not be delivered at all.

Key Points for Agencies:

• SPF: Only specified servers are allowed to send emails.
  Example: v=spf1 include:_spf.google.com ~all (for illustrative purposes only—must be adjusted to match your provider)
• DKIM: Signs every outgoing email. Register the public key via DNS.
• DMARC: Defines how mail servers handle unauthenticated emails (none, quarantine, reject) and provides reports.

Practical Tip: Enable DMARC reports to detect problems early and protect your email reputation.

Note: Email configurations must always be tailored to the specific provider. Refer to your email provider’s documentation to avoid errors.

4. Monitoring & Process Optimization

Simply setting everything up correctly isn’t enough. Websites need to be monitored to detect outages and security issues early on:

• Uptime monitoring: Pingdom, UptimeRobot, or similar tools check website availability.
• DNS Monitoring: Alerts for record changes prevent unintended downtime.
• Certificate Check: Automatic verification of expiration dates and configurations.

Workflow Tips

1. Centralize: Manage domains through a reseller system or dashboard.
2. Templates: Create standard DNS templates for websites, mail servers, and subdomains.
3. Automate: Automate renewals, SSL rollouts, and monitoring as much as possible.
4. Documentation: Log accesses, configurations, and changes.

5. Use Reseller Tools: Efficiency and Security

With our ResellerInterface, you can manage domains and SSL certificates from a single location. Benefits:

• Overview of All Domains, Terms, and Accounts
• Automatic Renewals and Alerts
• Role-Based Access for Team Members
• Deploy SSL Certificates with a Single Click

Pro Tip: Create a standard setup for each customer type so that new customers can be set up quickly, correctly, and securely.

Conclusion:

DNS, SSL, and the like aren’t rocket science, but they are the foundation of any stable client website. Agencies that handle these aspects properly can:

• Avoid Downtime
• Improve Security
• Preventing Email Problems
• Automate and Scale Processes

Investing in structured processes, monitoring, and centralized management pays off immediately and makes your life at the agency much less stressful.

Final note: The examples of DNS, SPF, DKIM, and DMARC records are for illustrative purposes only. Always verify the exact values for your provider yourself before using them in a production environment.