This article tells you how to edit the DNS/MX settings or restore the default DNS settings for a domain or subdomain.
Log in to the Gandi Customer Area/Dashboard:
Click on domains on the left side of the page
Select your domain
Click the DNS Records tab
Fill in the MX1 and MX2 fields with the codes that were sent to you at the end of your installation, then click save.
It usually takes 24 to 72 hours for the entry to be propagated. After about 15 minutes you can query our DNS server, which is updated more quickly.