As a Vendor
You can update your email address on your own via the Bonfire Settings page. First log into the portal you registered with (will be a link that looks like "example.bonfirehub.com" or "example.bonfirehub.ca"), and then click Settings in the top banner. Then in the sidebar, click the Email and Password tab and enter your new email in under Change Your Email.
Click the Change button when done. Please note that you will have to enter in your current password in order to change your email successfully. Once the change is made, you will have to confirm your email address again.
As a Buyer/Reviewer
If you are a buyer/reviewer and your organization has changed your email domain, you can change your email address following similar instructions as above. However, once you click Settings in the top banner, you will by default land on the Email and Password tab automatically.
By default, you will land on the Email and Password tab. Again, enter your new email in under Change Your Email, then type in your updated email as well as your current password, and click the Change button.