Is there a log of automatic emails?

We prefer to manually initiate item fulfillment emails.   It seems as though NS has been sending them automatically when items are fulfilled.   I just went in to [accounting preferences] and unchecked the box that most likely was causing this (>Set up>Accounting Preferences>Order management>"Send Order Fulfilled Confirmation Emails")    My questions are
1. will this stop any automated order processing emails from being sent

2. Will this hinder our ability to manually check "email" boxes or press the email button

3. Is there a log of emails sent that were generated by having the "send email" accounting option checked?    I only see message records for messages we manually initiated, but our customers seemed to be getting emails.