Mai mail dcm

I think you meant to type "My mail is DCM"!

DCM stands for "Dead Carrier Mail", which is a term used in the postal industry to describe mail that has been returned to the sender as undeliverable. This can happen for various reasons, such as the recipient's address being incorrect, the recipient having moved, or the mail being damaged or lost in transit.

If your mail is marked as DCM, it means that the postal service was unable to deliver it to the intended recipient and has returned it to you. You may need to update the recipient's address or contact them to arrange for re-delivery.