mention email diffusion list as resource

_sass/dynare.scss

@@ -58,6 +58,10 @@
     font-family: 'icomoon' !important;
     content: "\e906";
 }
+.icon-email:before {
+    font-family: 'icomoon' !important;
+    content: "\e915";
+}
 .icon-map-marker1:before {
     font-family: 'icomoon' !important;
     content: "\e913";

resources/index.md

@@ -14,6 +14,13 @@ an account and ask a question yourself. If you're a more experienced user,
 heading to the forum from time to time will allow you to learn the intricacies
 of Dynare and you might just be able to help out someone else out!
 
+# <i class="icon-email"></i> Mailing List
+If you would like to be informed of recent Dynare news by email (new releases,
+Summer School, and Conference dates), feel free to <i
+class="icon-external-link"></i> [sign up to receive
+notifications](https://www.dynare.org/cgi-bin/mailman/listinfo/info). This is a
+low traffic list; you'll receive at least 2 and on average 4 emails per year,
+depending on how many bug fix releases we create.
 
 # <i class="icon-graduation-cap"></i> Summer School