А что с jabber.org ?

<?xml version="1.0"?>

<stream:stream xmlns:stream="http://etherx.jabber.org/streams" version="1.0" xmlns="jabber:client" to="jabber.org">

<?xml version='1.0'?><stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' from='jabber.org' id='8789ea49eb804237' version='1.0'>

<stream:features>
<starttls xmlns="urn:ietf:params:xml:ns:xmpp-tls"/>
<mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl">
<mechanism>DIGEST-MD5</mechanism>
</mechanisms>
</stream:features>

<auth xmlns="urn:ietf:params:xml:ns:xmpp-sasl" mechanism="DIGEST-MD5"/>

<failure xmlns="urn:ietf:params:xml:ns:xmpp-sasl">
<not-authorized/>
</failure>