Because the protocol requires proof of work, it is an excellent solution to the e-mail spam.
Bitmessage also can be used for a mailing lists.
Look at the Google Trends statistics:
An open source client written in Python is available for free under the very liberal MIT license.
Here's how to run it under Ubuntu:
1. Download the source code:
$ git clone https://github.com/Bitmessage/PyBitmessage $HOME/PyBitmessage
This will make a "PyBitmessage" directory in your home directory with the latest source code.
2. Run the script:
$ cd $HOME/PyBitmessage/src/ && nohup python ./bitmessagemain.py
The program "nohup" will hide debug output and will prevent the script from stopping when you close the terminal.
If you want to read the debug messages:
$ cd $HOME/PyBitmessage/src/ && tail -f nohup
If you want to start Bitmessage automatically when you login, make a new file into your ~/.config/autostart/ directory:
$ gedit $HOME/.config/autostart/bitmessage.desktop
And paste this into the file:
[Desktop Entry] Type=Application Exec=nohup python /home/youruserfoler/PyBitmessage/src/bitmessagemain.py Hidden=false NoDisplay=false X-GNOME-Autostart-enabled=true Name=Bitmessage
Don't forget to change "youruserfoler" with your user's folder.
If you want a link on your desktop, you can make a new file into your desktop folder with the above content:
$ gedit $HOME/Desktop/bitmessage.desktop
Then you should click on the new icon with the right mouse button, select "Properties", click on "Permissions" and mark "[x] Allow executing file as program".
My Bitmessage address is: BM-Gti9B7i2RTvTh1GP1s68EPQ87AJ1VH2f.
You can add it not only to your address book, but also to your subscriptions (Bitmessage -> Subscriptions -> Add new Subscription) if you want to receive "broadcast messages" from my Bitmessage address.