Fix 550 “No Such User” Bounce Due to Email Routing in cPanel

When emails bounce with a “550 No Such User” message. This article explains how email routing settings in cPanel can cause this issue.

Email Routing options in cPanel define how incoming emails are handled by the server.
cPanel offers 3 setup options for Email Routing.

1. Local Mail Exchanger - This setup is to be used when the MX records of the domain point to the Web hosting server itself i.e the domain uses the email functionality offered by the cPanel installation on that server.

2. Remote Mail Exchanger - This setup is to be used when the domain uses an external email service, for example, Gsuite or any of our Email Hosting plans.

3. Backup Mail Exchanger - This setup is used when the MX record of the domain with lower priority points to the web hosting server.

Incorrect Email Routing

If the Email Routing is incorrectly configured, you may receive the below bounce back messages while sending emails to accounts of your domain



The bounceback will occur if :

1. The MX records point to the cPanel server but the Email Routing is set to "Remote Mail Exchanger" in cPanel.

2. The domain uses Remote MX records (such as Gsuite) but the Email Routing is set to “Local Mail Exchanger” in cPanel.

To Fix this Error

You will need to change the Email Routing settings in cPanel to Remote Mail Exchanger or Local Mail Exchanger based on your current MX record setup. This can be done by following the steps below:

1. Login to cPanel and navigate to the Emails Tab

2. Click On Email Routing

3. Select the appropriate option for your domain.

You can use the screenshot below for cPanel reference: 

In case the issue/error persists you can also contact support through your preferred channel.