Instead of using Google by default, we use pspell to avoid to send each mail to Google...
---- roundcube-0.1/config/main.inc.php.dist~ 2009-05-15 12:22:29.000000000 +0200
-+++ roundcube-0.1/config/main.inc.php.dist 2009-07-05 09:59:26.000000000 +0200
-@@ -199,7 +199,7 @@
+Index: roundcube/config/main.inc.php.dist
+===================================================================
+--- roundcube.orig/config/main.inc.php.dist 2012-09-29 11:30:57.895111972 +0200
++++ roundcube/config/main.inc.php.dist 2012-09-29 11:31:46.232078634 +0200
+@@ -441,7 +441,7 @@
// Set the spell checking engine. 'googie' is the default. 'pspell' is also available,
// but requires the Pspell extensions. When using Nox Spell Server, also set 'googie' here.