Mail plural form

The plural form of "mail" can be a bit tricky. Here are the different forms:

• Mail (singular) refers to a single piece of mail, such as a letter or package.
• Mails (plural) refers to multiple pieces of mail, such as several letters or packages.
• Mail (plural) is often used informally to refer to multiple pieces of mail, such as "I have a lot of mail to sort through."

For example:

• I received a piece of mail today. (singular)
• I received several pieces of mail today. (plural)
• I have a lot of mail to sort through. (informal plural)

It's worth noting that the word "mail" is often used as a mass noun, meaning it's not typically counted as individual units. For example, you wouldn't say "I have three pieces of mail" unless you're referring to specific, individual pieces of mail. Instead, you might say "I have a lot of mail" or "I have a big stack of mail."