This FAQ will show you how to delete an email forward rule
These instructions will show you how remove an existing email forward, for when you want to add a new one, or just don't need your existing one any more.
To delete an email forwarding rule, you first need to log into your 123-reg control panel, then follow the instructions below:
Scroll down the page until you reach the Email section.
Click on the Manage email link.
Find the email forwarding rule that you wish to edit under the Email Address section by selecting the relevant domain name for your email from the drop down box.
Tick the box to select the forwarding rule you wish to remove and press the Delete selected button.
Click on the Yes button to confirm the deletion.