I have found this to help with just posting to edu and gov sites
How can I post to .gov, .edu, .de, .es etc. only?
Go to "Skip sites where the following words appear in the URL/domain" and
add an exclamation mark followed by the domain ending. So for posting only to .edu sites you’d add !.edu
Please note to enter all "white listed" domains in one line like "!.edu !.gov !.gsa" and not one in each line.
However i have done this, added skip !.edu !.gov
BUT is still posts to .com .co.uk etc ...
Is there anything else i need to do ?
Do i have to add all of the ones i dont want it to post to as well? if so does anybody have a master list?