No, avast can protect as many accounts as you want (for pop3/smtp server accounts).

  1. Close all your email clients (programs)
  2. Start Menu > avast antivirus > Mail Protection Wizard
    Follow the non Outlook/Exchange option (i.e., the second one).
    You can choose the supported email programs and select all the accounts
    (even the ones created in the future).

Hope this help :wink: