Once you have setup Email Forwarding Service for your domain name, you need to modify your Name
Servers to the ones specified by Unique-Links. Generally,
the
Email Forwarding Service should start working within a span of 24-48 hours post
modification of Name Servers.
Reference:
Name Server
modification >>
Do not be confused when you encounter errors
such as No NS A records at nameservers while using some DNS Tools like
DNSReport.com. This does not indicate an error and will not affect the
Email Forwarding of your domain name.