Sun Media | 5,536 followers on LinkedIn. Sun Media Corporation, a division of Postmedia Network Inc. is Canada's largest newspaper publisher whose stated business purpose is to help connect and build better communities. With 43 paid-circulation and free dailies in Canada's key urban markets and more than 200 community publications, Sun Media's English- and French-language papers are leaders in providing local news and information to more than 10.5 million readers every week.