Internet, Web, and Other E-Issues
Q. What is the plural of email when it’s used as a noun?
A. Use email (not emails) or email messages for the plural form of the noun (“she gets a lot of email”); except informally, emails is better reserved for use as a verb (“he emails reminders to himself”). And whereas Merriam-Webster lists both e-mail (hyphen) and email (no hyphen), Chicago now prefers the latter.