When I press "messages" button on my 7941 phone it says you have 157 messages, while I only have 1 voice message. I do not want the unity to see and report on number of emails but only see and report my voice messages. How can I achieve this?
You are correct, the previous options I mentioned only affect the number of messages announced when you login. If you want to disable the ability for a subscriber to actually play back emails via Text to Speech (TTS), you will need to disable this in the Subscribers Class of Service (COS).
An administrator can do this in the SA by assigning a subscriber to a new COS that does not have TTS enabled, or update their assigned COS to not include TTS.
From SA-->Subscribers --> Profile you can identify/change which COS the subscriber is assigned to.
From COS --> Features uncheck the box "Text to Speech for e-mail messages.