diff --git a/actions/imsettings.php b/actions/imsettings.php
index b34f8ca12d..d8680c98b4 100644
--- a/actions/imsettings.php
+++ b/actions/imsettings.php
@@ -61,11 +61,11 @@ class ImsettingsAction extends SettingsAction {
 
 	function handle_post() {
 
-		$jabber = $this->trimmed('jabber');
+		$jabber = jabber_normalize_jid($this->trimmed('jabber'));
 		$jabbernotify = $this->boolean('jabbernotify');
 		$updatefrompresence = $this->boolean('updatefrompresence');
 
-		if (!jabber_validate_jid($jabber)) {
+		if (!jabber_valid_base_jid($jabber)) {
 			$this->show_form(_('Not a valid Jabber ID'));
 			return;
 		} else if ($this->jabber_exists($jabber)) {
diff --git a/lib/jabber.php b/lib/jabber.php
new file mode 100644
index 0000000000..141b9231ff
--- /dev/null
+++ b/lib/jabber.php
@@ -0,0 +1,33 @@
+<?php
+/*
+ * Laconica - a distributed open-source microblogging tool
+ * Copyright (C) 2008, Controlez-Vous, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+if (!defined('LACONICA')) { exit(1); }
+
+function jabber_valid_base_jid($jid) {
+	# Cheap but effective
+	return Validate::email($jid);
+}
+
+function jabber_normalize_jid($jid) {
+		preg_match("/(?:([^\@]+)\@)?([^\/]+)(?:\/(.*))?$/", $jid, $matches);
+		$node = $matches[1];
+		$server = $matches[2];
+		$resource = $matches[3];
+		return strtolower($node.'@'.$server);
+}
diff --git a/lib/util.php b/lib/util.php
index d990b8e1f0..7a9bed2c91 100644
--- a/lib/util.php
+++ b/lib/util.php
@@ -319,6 +319,25 @@ function common_input($id, $label, $value=NULL,$instructions=NULL) {
 	common_element_end('p');
 }
 
+function common_checkbox($id, $label, $value='true',
+						 $instructions=NULL)
+{
+	common_element_start('p');
+	$attrs = array('name' => $id,
+				   'type' => 'checkbox',
+				   'id' => $id, 
+				   'value' => $value);
+	if ($value) {
+		$attrs['value'] = htmlspecialchars($value);
+	}
+	common_element('input', $attrs);
+	common_element('label', array('for' => $id), $label);
+	if ($instructions) {
+		common_element('span', 'input_instructions', $instructions);
+	}
+	common_element_end('p');
+}
+
 function common_hidden($id, $value) {
 	common_element('input', array('name' => $id,
 								  'type' => 'hidden',
diff --git a/xmppdaemon.php b/xmppdaemon.php
index aa402b1e2c..b71c93dc81 100644
--- a/xmppdaemon.php
+++ b/xmppdaemon.php
@@ -51,14 +51,6 @@ class XMPPDaemon {
 		return !$this->conn->disconnected;
 	}
 
-	function normalize_jid($jid) {
-		preg_match("/(?:([^\@]+)\@)?([^\/]+)(?:\/(.*))?$/", $jid, $matches);
-		$node = $matches[1];
-		$server = $matches[2];
-		$resource = $matches[3];
-		return strtolower($node.'@'.$server);
-	}
-
 	function handle() {
 		while(!$this->conn->disconnected) {
 			$payloads = $this->conn->processUntil(array('message', 'presence',
@@ -87,7 +79,7 @@ class XMPPDaemon {
 		if (strlen($pl['body']) == 0) {
 			return;
 		}
-		$from = $this->normalize_jid($pl['from']);
+		$from = jabber_normalize_jid($pl['from']);
 		$user = User::staticGet('jabber', $from);
 		if (!$user) {
 			$this->log(LOG_WARNING, 'Message from unknown user ' . $from);
@@ -162,7 +154,7 @@ class XMPPDaemon {
 	}
 
 	function handle_presence(&$pl) {
-		$from = $this->normalize_jid($pl['from']);
+		$from = jabber_normalize_jid($pl['from']);
 		$user = User::staticGet('jabber', $from);
 		if (!$user) {
 			$this->log(LOG_WARNING, 'Message from unknown user ' . $from);