Dynamic DNS hostnames can be easily modified after being created. You can modify the service type, TTL, and more.

1.  Log into your Dyn account.
2.  Click on My Hosts.
3.  Select the hostname that you would like to modify from the DynDNS Hostnames list.
4.  The following fields can be modified on an existing hostname:  Wildcard Ensures that if you or someone you've entrusted with your hostname appends the hostname with a prefix (e.g., www.) that it will still resolve. Service Type IPv4 address (a) IPv6 address (b) Webhop to another full URL (c) Looking to do some mail routing or modify the TTL? Click here for help.
5.  Click Save Changes to commit the changes.

Advanced Remote Access Options

Dyn Remote Access gives you the flexibility to set up your new hostname for mail routing. You also have the ability to select a custom TTL (Time To Live) value for your hostname, in the event that your use case requires it.

TTL Value

A record's TTL, or Time To Live, is the length of time (in seconds) that caching name servers will store your host's information in their local cache before performing a new query. Setting a low TTL value (e.g., 60 seconds) will shorten the length of time that it takes other name servers to notice that a change occurred.

Mail Routing

If your use case requires the ability to receive mail on behalf of the hostname you've created, you can use this field to specify the name of the mail server.