Workaround: Passing email in two parts to shortcode

config.yaml

@@ -9,6 +9,21 @@ blackfriday:
 Params:
   flatterid: 4pq200
 
+Author:
+  # String to hex encoder: http://www.wbwip.com/wbw/emailencoder.html
+  main:
+    - identifier: torsten
+      name: Torsten Grote
+      emaillocal: torsten
+      emaildomain: briarproject.org
+      keyurl: https://grobox.de/gpg/0x74DCA8A36C52F833.asc
+
+    - identifier: michael
+      name: Michael Rogers
+      emaillocal: contact
+      emaildomain: briarproject.org
+      keyurl: /keys/contact.asc
+
 permalinks:
   #post:  /:section/:year/:month/:title/
   page: /:slug/

layouts/shortcodes/contact.html

 <h3 id="contact">Contact</h3>
+{{ range .Site.Author.main }}
 <p>
-Torsten Grote <<a
-href="mailto:torsten&#64;briarproject.org">torsten&#64;briarproject.org</a>>
-[<a href="https://grobox.de/gpg/0x74DCA8A36C52F833.asc">PGP key</a>]
-</p>
-<p>
-Michael Rogers <<a
-href="mailto:contact&#64;briarproject.org">contact&#64;briarproject.org</a>>
-[<a href="/keys/contact.asc">PGP key</a>]
+{{ .name }} <<a
+href="mailto:{{ .emaillocal }}&#64;{{ .emaildomain }}"
+>{{ .emaillocal }}&#64;{{ .emaildomain }}</a>>
+[<a href="{{ .keyurl }}">PGP key</a>]
 </p>
+{{ end }}