You can enhance your privacy when browsing and posting to this forum by using the free and open source Tor Browser and posting as a guest (using a fake e-mail address such as nobody@nowhere.com) or registering with a free, anonymous ProtonMail e-mail account. Registered users can exchange private messages with other registered users and receive notifications.
After a couple days using Peerio, I'm impressed. Feel free to use it to contact me privately if you like. Note that the e-mail address you use to register your Peerio account will be visible to other Peerio users you contact, so while Peerio offers good privacy, it doesn't necessarily offer anonymity.
This is my Peerio avatar. It serves to verify my cryptographic identity:
Posted by: George W. Maschke Posted on: Jan 14th, 2015 at 7:03pm
There is a new free, open source app for Windows, Macintosh, Chrome (and soon, Android and iOS) for secured e-mail/messaging and file sharing called Peerio that looks promising: