• E-mail addresses, like Internet URLs, do not allow spaces. Because no spaces are allowed in e-mail addresses, names might be broken up with a period; for example, John Smith's e-mail address could be john.smith@computerhope.com or john.s@computerhope.com.
• Depending on the e-mail client you're using, the technique for sending numerous e-mail addresses may differ. You can specify several addresses in the To:, Cc:, or Bcc: sections in most e-mail clients and web services by putting a comma between each address.

Read More: Where are emails stored?