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This document is for a previous release of cPanel & WHM. To view our latest documentation, visit our Home page.

For cPanel & WHM 11.46

(Home >> Service Configuration >> Exim Configuration Manager)


The features in the Exim Configuration Manager interface allow you to modify your Exim configuration. Exim is a mail transfer agent that cPanel & WHM includes. Mail transfer agents send and receive email messages for your server.

Basic Editor

The Basic Editor tab allows you to modify the options in your Exim configuration.

For detailed information about each option in the Basic Editor tab, read our Exim Configuration Manager - Basic Editor documentation.

Advanced Editor


This feature is for advanced users. Exercise extreme caution when you use this feature.

  • Changes that you make to the default configuration can significantly impact Exim's performance, and may render Exim nonfunctional.
  • Exim does not update your configuration changes across Exim updates and reinstallation.

Click the Advanced Editor tab to modify Exim's default configuration. For information about how to configure these directives, read Exim's configuration syntax documentation.

For most changes that you make to your Exim configuration, the system changes both the /etc/exim.conf and /etc/exim.conf.local files.

  • The /etc/exim.conf.local file is Exim's override file and stores Exim's default configuration. 
  • For custom ACL changes to the Exim configuration, the system creates a file in a subdirectory under the /usr/local/cpanel/etc/exim/acls/ directory. For example, if you create a custom acl_smtp_helo_block entry, the system stores the setting in the /usr/local/cpanel/etc/exim/acls/ACL_SMTP_HELO_BLOCK/custom_begin_smtp_helo file.

To skip RBLs for specific domains, log in as the root user and use your preferred text editor to create and edit the /etc/skiprbldomains file.

  • Add the domains to the file, with one domain name per line.

  • After you create the /etc/skiprbldomains file, enable the skip_rbl_domains directive.


The Backup tab allows you to create a backup of your Exim configuration, which you can either download to your computer or save on the server.

To create a backup, perform the following steps:

  1. Select one of the following options:
    • Download — Save the backup to a local drive on your computer.
    • Save on Server — Save the backup to the server.
  2. Click Run Backup.


You cannot delete backups.


The Restore tab allows you to restore an existing backup of an Exim configuration.

To restore an Exim configuration backup that you saved to a local drive, perform the following steps:

  1. Click Choose File to select the backup file (the default save format is .tar.gz).
  2. Click Upload to upload and restore the selected backup file.

To restore an Exim configuration backup that was previously saved from the server, click the Restore link for the file name of backup that you wish to restore.


The Reset tab allows you to restore Exim's default configuration. To do this, select the type of reset that you wish to perform from the Reset type menu, and click Reset


Read the description of your chosen reset type carefully. The description appears below the Reset type menu.

Additional documentation

  • Some Basics about SMTP — This document explains the importance of defining SMTP options in order to protect your bandwidth.
  • Scan Outgoing Mail — This document explains how to scan outgoing mail for spam.