I usually clear-sign all my e-mails using GPG. To verify these signatures or to send me a strongly encrypted e-mail, you can get my GPG public key in two ways. The recommended one is

gpg --recv-keys 0x11AF6AD8

as you will also get the most recent signatures this way. As an alternative, you can download the key (sometimes you'll need to right-click and "Save as..") and import it via

gpg -a --import florian.echtler.asc