These are mail protocols that govern the inbound / outbound email and those
fields in the setup reference the servers your ISP or email provider use to
route email. You may also need the port numbers and options (checkboxes)
appropriate for the company's email servers. Best check their website (try
searching for "mail client setup" or similar), or call them for this
specific info. If you tell us ONLY the part AFTER the @ symbol in your
email address (only after @, please), we may be able to help you.