123 reg mail mac

It looks like you're trying to send a registered mail to a Mac address!

To clarify, a Mac address (also known as a Media Access Control address) is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network.

On the other hand, "123 reg mail" likely refers to sending a registered mail with a tracking number starting with "123".

If you're trying to send a registered mail to a Mac address, I'm afraid it's not possible. Mac addresses are used for network communication, not for sending physical mail.

If you meant to send a registered mail to a physical address, you can use a service like USPS, UPS, or FedEx to track your package. Make sure to include the correct recipient's address and a tracking number to ensure delivery.

Please clarify if I'm correct or if there's anything else I can help you with!