Is mail valid

A simple question!

In the context of programming and data validation, "mail" is often used as a shorthand for "email". So, in this case, "mail" is indeed a valid term, and it refers to a unique address used to send and receive electronic messages over the internet.

However, if you're asking about the validity of the term "mail" in a more general sense, it's worth noting that "mail" is a noun that refers to a system of sending and receiving physical letters, packages, and other postal items. In this context, "mail" is also a valid term, and it's often used interchangeably with "post" or "postage".

So, to summarize:

• In programming and data validation, "mail" is a valid term that refers to an email address.
• In a more general sense, "mail" is a valid term that refers to a system of sending and receiving physical postal items.