Time and time again I get notification of a product update, and start to get excited about the new feature or improvement - only for right at the end of the article to read "this is for US only, it's not available to Canada".

So maybe make your updates country specific. If this update / improvement / new feature is not available to a segment of your customer base either 1) don't send us an email telling us about it, or at least 2) LEAD with the information that this is for US only.