Introduction

cPanel allows administrators to limit the number of emails that can be sent per hour to help prevent spam, reduce the risk of compromised accounts sending bulk emails, and maintain the server’s email reputation. These limits can be configured at the server level or for individual domains.

Prerequisites

  • Root access to the server or a user with sudo privileges.
  • SSH access to the cPanel server.
  • Basic knowledge of Linux command-line operations.
  • cPanel/WHM installed on the server.

Procedure

Server-Wide Email Limit

Step 1: Log in to the server via SSH.

Connect to the server as the root user or a sudo-privileged user.

Step 2: Configure the server-wide email limit.

Edit the following file:

/var/cpanel/maxemailsperhour

Enter the maximum number of emails that all accounts are allowed to send per hour. For example:

500

Domain-Level Email Limit

Step 3: Configure the email limit for a specific domain.

Navigate to the following directory:

/var/cpanel/maxemailsperdomain

Create a file with the same name as the domain. For example, for example.com:

touch /var/cpanel/maxemailsperdomain/example.com

Step 4: Set the email limit.

Edit the domain file and specify the maximum number of emails the domain can send per hour.

Example:

200

This limits example.com to sending 200 emails per hour.

Step 5: Apply the changes.

After updating the configuration files, rebuild the email configuration by running:

/scripts/build_maxemails_config

This command applies the updated email limits.

Conclusion

Configuring email sending limits in cPanel helps protect the server from spam, prevents abuse by compromised accounts, and improves email deliverability. You can configure limits globally for the entire server or individually for each domain. After making any changes, always run the build_maxemails_config script to ensure the new settings are applied successfully.

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