Brazil to create secure email service; impact?

I recently retweeted about plans to create a secure email service in Brazil,

what implications could this have to those sending to this ISP? i asked myself. The article from the BBC is a good source to start from, but then what about those insecure external sources sending communications to this new email service?

There are some strong stories of late in the media in regards to security threats, snooping and of others obtaining secure information, one of those being the NSA.

So what can we expect?