If you have Domain Manager or web hosting services with Netregistry but want to manage your emails with an external email provider, you can remove the default Netregistry Mail Exchange (MX) records from the zone file of your domain.
In addition to removing the Netregistry MX records, if you manage your emails externally, you will need to make sure to add MX records that point to your external mail provider's mail exchange.
Removing Netregistry's MX records from zone manager
Warning: When disabling email, all associated email accounts will be deleted and any emails stored on our servers will be erased. Ensure that any important emails have been backed up. Contact Netregistry support for further information or assistance.