Biggest mailing list on the web

Biggest mailing list on the web are yahoogroups.com but Google also has great mailing list community, that's groups.google.com, so if you wanna read fresh content everyday from your own mailbox, of course that contents are chosen by yourself, because mailing list contains so many topics and community in single database, so it's more simple way to get more ideas for your blog content, it's very valued tool to make fresh content if you're professional blogger.