diff --git a/ks/centos6-liveCD-desktop.cfg b/ks/centos6-liveCD-desktop.cfg
index 17d326c..507c708 100644
--- a/ks/centos6-liveCD-desktop.cfg
+++ b/ks/centos6-liveCD-desktop.cfg
@@ -278,6 +278,10 @@ gconftool-2 --direct --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults
 # disable PackageKit update checking by default
 gconftool-2 --direct --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t int /apps/gnome-packagekit/update-icon/frequency_get_updates "0" >/dev/null
 
+# Switching to Thunderbird as the default MUA
+gconftool-2 --direct --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults --type string --set /desktop/gnome/url-handlers/mailto/command "thunderbird %" >/dev/null
+
+
 # detecting disk partitions and logical volumes 
 CreateDesktopIconHD()
 {
diff --git a/ks/centos6-liveDVD-desktop.cfg b/ks/centos6-liveDVD-desktop.cfg
index 1130c88..2c44197 100644
--- a/ks/centos6-liveDVD-desktop.cfg
+++ b/ks/centos6-liveDVD-desktop.cfg
@@ -299,6 +299,10 @@ gconftool-2 --direct --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults
 # disable PackageKit update checking by default
 gconftool-2 --direct --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults -s -t int /apps/gnome-packagekit/update-icon/frequency_get_updates "0" >/dev/null
 
+# Switching to Thunderbird as the default MUA
+gconftool-2 --direct --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults --type string --set /desktop/gnome/url-handlers/mailto/command "thunderbird %" >/dev/null
+
+
 # detecting disk partitions and logical volumes 
 CreateDesktopIconHD()
 {