Settings:
Domain: require the "fully qualified domain name" (fqdn), like "mydomain.no-ip.org" or "myname.servequake.com".
Username: your no-ip username.
Password: your np-ip password.
Advanced settings:
Enable wildcard: Not supported.
MX domain: Not supported.
Backup MX: Not supported.
For more info, visit the no-ip support pages.