If I want to send an email to a list of people, will the recipients see all the recipient email address in the email? Will the emails be sent as a BCC.
No they will not. When an email is sent to a list we send out a separate email to everyone on the list. The recipient will only see their email in the "To" field and your email in the "From" field (this also means we do not send emails using the BCC field).