Here’s some of the space exploration mailing lists I subscribe to which I find interesting.

Science @ NASA.Science stories and involvement projects that bring the cutting edge to people interested in science. Anywhere from 1-4 new stories a week, each announced by an e-mail to your address
Earth Observatory by NASA. Once a week you will receive a short notice from the Earth Observatory telling you about the latest stories, data, and other points of interest that have been added to NASA’s Earth Observatory site.
J-Pass Generator by NASA creates satellite prediction reports for up to 10 satellites and e-mails them directly to you. Each report gives you the times your chosen satellites are going to cross through your sky during the next three days, the approximate location, and the visible brightness.
ESA Portal by the European Space Agency. Recieve general ESA news, plus Human Spaceflight, Earth Observing, Space Science, Engineering, Operations and Technology.
JAXA Mail Service by Japan Aerospance Exploration Agency. With this JAXA Mail Service, latest happy funtime information from JAXA will automatically be e-mailed to your address.
CSA Distribution List by the Canadian Space Agency otherwise known as l’Agence Spatiale Canadienne.
Spaceflight Now, a general human spaceflight web site, pretty informative.

I have not been able to find an English language Roscosmos mailing list, but I imagine that it’d be a good read.