IP range email filtering allows you to control incoming email traffic based on the originating IP address or a defined IP range. This can be particularly useful when dealing with repeated spam attacks from a specific network or when restricting email access from certain geographical regions.

Domains.co.za hosting includes tools within cPanel that allow you to create filtering rules based on sender IP addresses. You can either configure email-level filters or block IP addresses entirely using the IP Blocker feature.

Correctly configuring IP range filters can significantly reduce unwanted email traffic and improve overall inbox security. However, it is important to apply such rules carefully to avoid blocking legitimate senders.

This guide explains how to configure IP range email filtering using your Domains.co.za hosting account.

How to Setup IP Range Email Filtering

Method 1: Using Email Filters

1. Login to Your Domains.co.za Account.

2. Open the Manage Services dropdown menu and access your hosting plan.

3. On the next page, click Manage next to your domain.

4. Under Product Information, click Login next to Control Panel to access cPanel.

5. Under Email in cPanel, click Global Email Filters.

6. Click Create a New Filter.

7. Name your filter.

Rule:

• Select Sender’s IP address.
• Use “begins with” for IP range.

Example:
102.54.

Action:

• Discard message.
• Fail with message.

Click Create.

Method 2: Using IP Blocker

1. In cPanel under the Security section, click IP Blocker.

2. Enter IP or range:

102.54.0.1-102.54.0.50

3. Click Add.

Additional Information

• Blocking IP ranges should always be approached with caution. Many email providers use shared IP addresses, meaning that blocking a wide range may prevent legitimate businesses or customers from contacting you.
• Before blocking an IP range, review your email headers to confirm the true originating IP address of the unwanted messages. Blocking the wrong IP may not resolve the issue and could create further communication problems.
• It is recommended that you use SpamAssassin and standard email filters before implementing broader IP range blocks. IP blocking should typically be used only when repeated abuse from a specific source has been clearly identified.
• If you are unsure about which IP addresses to block, the Domains.co.za Support can assist you in analysing email headers and determining the safest course of action.
• Finally, always keep a record of blocked IP addresses and review them periodically. Networks change ownership over time, and an IP address that was once problematic may later belong to a legitimate sender.

Login to Domains.co.za Account

1. Go to the Domains.co.za website Account Login page.

2. Enter your Email and Password and click the Sign In button.

3. You will see the Domains.co.za Dashboard, displaying the Manage Account menu on the left and your Account Information, Account Overview and Open Support Tickets on the right.