Thunderbird is a free e-mail client that allows users running Microsoft Windows, macOS, Linux, and other supported systems to send, receive, and manage their e-mail.

Users can configure Thunderbird to retrieve e-mail from their e-mail provider using IMAP or POP3, and send e-mail using SMTP.

E-mail terms, Internet terms, Mozilla

  • E-mail help and support.
  • The official Thunderbird website.