點解其他人唔能夠起我個BLOG留言???

因為這是yahoo 設定
要在yahoo blog的yahoo會員先可以留言

必須申請了yahoo hk blog

因為冇申請過香港yahoo blog
就出現那段英文

Sorry, the page you requested was not found.

Please check the URL for proper spelling and capitalization. If you're having trouble locating a destination on Yahoo!, try visiting the Yahoo! home page or look through a list of Yahoo!'s online services. Also, you may find what you're looking for if you try searching below

提外話
如果是奇摩blog的話，就只要對方擁有id
對方在blog選了
允許yahoo 奇摩會員留言

香港blog沒有回應制
必須對方擁有yahoo blog才可以留言

希望幫到你