Overview:

Third-party email hosting providers can offer some advantages over using the free cPanel email management services, such as more in-depth spam filtering services and more granular account management.  As cPanel is able to support third-party mail providers,  this guide details how to configure your cPanel to work with the third-party service.

Prerequisites:

1. Locate your third-party email provider's DNS requirements, often found in a welcome email or through knowledgebase articles.
2. If you're using Micron21 Hosted Exchange, you can review the setup requirements here.

Method:

1. Log into your cPanel hosting environment.
2. Navigate to the "Zone Editor" tool and enter the DNS records required by your third-party mail provider.
3. Ensure that you delete or edit any existing MX/SPF records that are listed - as multiple entries for different hosts will cause deliverability issues.
4. Once all records are added, navigate to the "Email Routing" tool in the "Email" category.
5. Select the domain associated with the changes from the drop-down menu.
6. Select the "Remote Mail Exchanger" and then click "Change" to commit the change.

Do keep in mind that changes to DNS can take between 2-8 hours to action due to propagation. After this time your domains will resolve using the new details.