diff --git a/createlinks b/createlinks
index 13d3a8e..039855e 100755
--- a/createlinks
+++ b/createlinks
@@ -10,6 +10,7 @@ templates2events("/etc/cron.d/sogo-alarm", qw(email-update bootstrap-console-sav
 templates2events("/var/lib/sogo/GNUstep/Defaults/.GNUstepDefaults", qw(email-update bootstrap-console-save pre-backup));
 templates2events("/etc/sysconfig/sogo", qw(email-update bootstrap-console-save));
 templates2events("/etc/logrotate.d/sogo", qw(email-update bootstrap-console-save));
+templates2events("/etc/pam.d/dovecot", qw(email-update bootstrap-console-save));
 
 safe_symlink("restart", "root/etc/e-smith/events/email-update/services2adjust/sogod");
 safe_symlink("restart", "root/etc/e-smith/events/email-update/services2adjust/memcached-sogo");
diff --git a/ipasserelle-groupware.spec b/ipasserelle-groupware.spec
index dace8d5..4ca5503 100644
--- a/ipasserelle-groupware.spec
+++ b/ipasserelle-groupware.spec
@@ -23,6 +23,9 @@ Requires: sope49-gdl1-mysql
 Requires: sogo-ealarms-notify
 Requires: ipasserelle-base
 Requires: memcached
+Requires: ipasserelle-portal
+Requires: smeserver-lemonldap-ng >= 0.2.6
+Requires: smeserver-pam_cas
 
 Obsoletes: smeserver-sogo
 Provides: smeserver-sogo
diff --git a/root/etc/e-smith/templates/etc/pam.d/dovecot/05cas b/root/etc/e-smith/templates/etc/pam.d/dovecot/05cas
new file mode 100644
index 0000000..668824c
--- /dev/null
+++ b/root/etc/e-smith/templates/etc/pam.d/dovecot/05cas
@@ -0,0 +1,10 @@
+{
+if (-d '/var/service/dovecot'){
+    $OUT .=<<"HERE";
+auth    sufficient      pam_cas.so -simap://localhost -f/etc/pam_cas.conf
+HERE
+}
+else{
+    return "";
+}
+}
diff --git a/root/etc/e-smith/templates/etc/pam.d/dovecot/10SystemAuth b/root/etc/e-smith/templates/etc/pam.d/dovecot/10SystemAuth
new file mode 100644
index 0000000..a85aeae
--- /dev/null
+++ b/root/etc/e-smith/templates/etc/pam.d/dovecot/10SystemAuth
@@ -0,0 +1,4 @@
+auth       required     pam_nologin.so
+auth       include      system-auth
+account    include      system-auth
+session    include      system-auth
diff --git a/root/etc/e-smith/templates/etc/pam.d/dovecot/template-begin b/root/etc/e-smith/templates/etc/pam.d/dovecot/template-begin
new file mode 100644
index 0000000..292d302
--- /dev/null
+++ b/root/etc/e-smith/templates/etc/pam.d/dovecot/template-begin
@@ -0,0 +1,8 @@
+{
+    $OUT = <<HERE;
+#%PAM-1.0
+HERE
+
+    $OUT .=
+    Text::Template::_load_text("/etc/e-smith/templates-default/template-begin");
+}
diff --git a/root/etc/e-smith/templates/var/lib/lemonldap-ng/conf/lmConf/060SOGo b/root/etc/e-smith/templates/var/lib/lemonldap-ng/conf/lmConf/060SOGo
new file mode 100644
index 0000000..eb9f7dc
--- /dev/null
+++ b/root/etc/e-smith/templates/var/lib/lemonldap-ng/conf/lmConf/060SOGo
@@ -0,0 +1,16 @@
+{
+
+$conf->{'applicationList'}->{'010apps'}->{'sogo'} = {
+    'options' => {
+        'logo' => 'mail.png',
+        'name' => 'SOGo',
+        'description' => 'Mails, agendas, contacts',
+        'uri' => "https://$host.$domain/SOGo",
+        'display' => 'on'
+    },
+    'type' => 'application'
+} unless ($conf->{'applicationList'}->{'010apps'}->{'sogo'});
+
+$OUT = '';
+
+}
diff --git a/root/etc/e-smith/templates/var/lib/sogo/GNUstep/Defaults/.GNUstepDefaults/55authSource b/root/etc/e-smith/templates/var/lib/sogo/GNUstep/Defaults/.GNUstepDefaults/55authSource
index 43e1722..c46a281 100644
--- a/root/etc/e-smith/templates/var/lib/sogo/GNUstep/Defaults/.GNUstepDefaults/55authSource
+++ b/root/etc/e-smith/templates/var/lib/sogo/GNUstep/Defaults/.GNUstepDefaults/55authSource
@@ -55,4 +55,12 @@
                 type = ldap;
             \}
         );
-
+{
+    # is smeserver-dovecot installed ?
+    if (-d '/var/service/dovecot'){
+        $OUT .=<<"HERE";
+    SOGoAuthenticationType = cas;
+    SOGoCASServiceURL = "https://auth.$DomainName/cas/";
+HERE
+    }
+}
diff --git a/root/usr/lib/perl5/site_perl/Apache/FilterChangeLength.pm b/root/usr/lib/perl5/site_perl/Apache/FilterChangeLength.pm
new file mode 100644
index 0000000..b09a1d9
--- /dev/null
+++ b/root/usr/lib/perl5/site_perl/Apache/FilterChangeLength.pm
@@ -0,0 +1,52 @@
+package Apache::FilterChangeLength;
+
+use strict;
+use warnings FATAL => 'all';
+
+use Apache2::RequestRec ();
+
+use APR::Table ();
+use APR::Bucket ();
+use APR::Brigade ();
+
+use base qw(Apache2::Filter);
+
+use Apache2::Const -compile => qw(OK);
+use APR::Const     -compile => ':common';
+
+sub handler {
+    my ($filter, $bb) = @_;
+    my $ctx = $filter->ctx;
+    my $data = exists $ctx->{data} ? $ctx->{data} : '';
+    $ctx->{invoked}++;
+    my ($bdata, $seen_eos) = flatten_bb($bb);
+    $data .= $bdata if $bdata;
+
+    if ($seen_eos) {
+        my $len = length $data;
+        $filter->r->headers_out->set('Content-Length', $len);
+        $filter->print($data) if $data;
+    }
+    else {
+        # store context for all but the last invocation
+        $ctx->{data} = $data;
+        $filter->ctx($ctx);
+    }
+
+    return Apache2::Const::OK;
+}
+
+sub flatten_bb {
+    my ($bb) = shift;
+    my $seen_eos = 0;
+
+    my @data;
+    for (my $b = $bb->first; $b; $b = $bb->next($b)) {
+        $seen_eos++, last if $b->is_eos;
+        $b->read(my $bdata);
+        push @data, $bdata;
+    }
+    return (join('', @data), $seen_eos);
+}
+
+1;