Email has been subjected to hacking for years now. According to Radicati, the total number of emails (business and consumer) sent and received will surpass 376 billion daily by the end of 2025. Therefore, if email servers are not secured, it poses a significant risk of hacking.

To mitigate such risks, companies increasingly focus on their email servers. However, while it is better than relying on third-party email servers, it cannot wholly eliminate the slight risk of hacking.

Also, if you’re searching for premium Email Hosting in NZ, you can check and opt for the best domain and Email Hosting Services at an affordable cost.

This article discusses the best practices for email server security.

What Is a Secure Email Server?

When you take specific measures to protect your NZ Email Hosting Server, it is called a secure email server. It includes protecting your email account and ensuring the security of all your employees’ accounts. 

It involves preventing unauthorized emails from being sent from your organization’s domain, implementing email filters, and using antivirus protections. 

In addition, when you build your email server, it is essential to ensure it is physically inaccessible to unauthorized individuals. 

Email Server Security Best Practices You Implement Now

  1. Change the Default Configurations, Passwords, and Usernames for Your Email Server

Change your email server’s default configurations, usernames, and passwords to enhance security.

  1. Set Up Mail Transfer Agent Strict Transport Security (MTA-STS)

Enable MTA-STS on your email server to ensure secure, authenticated connections for incoming emails, protecting recipients from unauthenticated messages sent via insecure connections.

  1. Select Secure Email Protocols

Install an SSL/TLS certificate on your email server to enable HTTPS, encrypt communications between your server and other email servers, and ensure secure message transmission.

  1. Embrace DMARC

Implement DMARC to prevent brand domain spoofing. 

The protocol stands for “Domain-based Message Authentication, Reporting, and Conformance,” which protects your domain from unauthorized individuals attempting to impersonate your organization, reducing the risk of phishing scams and safeguarding your brand reputation.

  1. Use Current with Patches and Updates

Ensure timely application of patches and updates to keep your server software and firmware current. Running outdated or unpatched versions of your server’s software poses significant security risks. 

Publishers or developers release patches to address bugs and vulnerabilities. Please apply these updates to avoid exposing your email server to exploitation by cybercriminals seeking unauthorized access.

  1. Use Email Server Firewall

Enable email server firewalls to monitor your organization’s inbound and outbound traffic. These firewalls filter incoming and outgoing communications based on predefined rules, allowing you to observe your domain’s activities and detect suspicious behavior. 

Additionally, it is advisable to set rate limits and size restrictions on outbound traffic to prevent abuse or unauthorized data exfiltration.

  1. Sharing Privlger access

Exercise caution when granting access to your mail server, ensuring you only provide access to those requiring it. 

For individuals needing primary data, provide them basic access, such as view and edit permissions. However, for those who require admin or privileged access, it is essential to verify their trustworthiness. 


Your emails contain sensitive data about your business. 

So, securing your business emails and protecting sensitive data is crucial. In addition, implementing best practices is essential to safeguard your information from unauthorized access and potential data breaches. 

Applying the steps mentioned above, choose the best Business Email Hosting plans. As a result, you can enhance email security and mitigate the risks associated with data mismanagement.

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