Couple of questions

Goodly afternoon all...
(1) At the bottom of the board is "Delete All Board Cookies"
By clicking on that will I lose my "Password" for Logging IN?
Is it a good idea to delete all board cookies when Logging OUT every time?
(2) Getting E-Mails from Simviation about post notifications.
I have gone to:
-User Control Panel>Overview>Board Preferences
-Clicked NO to the two separate items:
-Notify me on new private messages..............NO
-Pop up window on new private messages.......NO
Hope this will stop E-Mails from coming through.
I still want PMs to come through to the new messages at the top of the forum page between User Control Panel and Members.
(1) At the bottom of the board is "Delete All Board Cookies"
By clicking on that will I lose my "Password" for Logging IN?
Is it a good idea to delete all board cookies when Logging OUT every time?
(2) Getting E-Mails from Simviation about post notifications.
I have gone to:
-User Control Panel>Overview>Board Preferences
-Clicked NO to the two separate items:
-Notify me on new private messages..............NO
-Pop up window on new private messages.......NO
Hope this will stop E-Mails from coming through.
I still want PMs to come through to the new messages at the top of the forum page between User Control Panel and Members.