email, emails

When the noun email means “a message sent by email,” the plural form is emails:

  • I received 10 emails (or messages) yesterday.

When there is no mention of number, email is used in the singular form as a mass (or uncountable) noun:

  • I received email yesterday.

The confusion about the use of the plural form emails likely arises because mail (delivered by Canada Post) is a mass noun and thus has no plural form:

  • Jack received mail—one magazine, two bills and one postcard.


  • Jack received four pieces of mail.

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