for downloading keys, right-click on the name and choose "save as" to save to a local file. Use the "import function" of your encryption software (see below for links to encryption software) to add the contents of this file to your keyring file.
Benedikt Steinkohl
Karin Steinkohl
Kilian Steinkohl
Konrad J. Steinkohl
Some helpful links about email encryption:
The PGP international site
The GNU Privacy Guard
(GPG is a free implementation of the OpenPGP standard, free available under the GNU General Public License)
and sorry, as far as we know, there is no free software for Microsoft mailing tools like Outlook or Outlook express.