Sending encrypted e-mail
In order to send encrypted e-mails, you must instruct your email program to use a PGP enabled program such as an extension (plugin etc.).
The common extension for Mozilla Thunderbird is Enigmail https://addons.mozilla.org/en-US/thunderbird/addon/enigmail/. For Microsoft Outlook, plugins seem to exist as well.
PGP (Pretty Good Privacy): http://en.wikipedia.org/wiki/Pretty_Good_Privacy
You can download my PGP key here: ID 0x71AE1E17 Download (Use Save as..) and then import it to the key store of your cryptographic program.
Key fingerprint = F7DA EC5A 7646 9C82 C478 203B 0B5F 9B18 71AE 1E17
Ronny Forberger <firstname.lastname@example.org>