The point is that: <stream:stream xmlns:stream='<a href="http://etherx.jabber.org/streams'">http://etherx.jabber.org/streams'</a>> <message><gajim:die/></message> </stream> contains an unbound prefix 'gajim', so MUST be rejected by all XMPP parsers..  If you want to send xml that looks similar to that, you need to transmit one of the following: <div class="Ih2E3d"></div> <stream:stream xmlns:stream='<a href="http://etherx.jabber.org/streams">http://etherx.jabber.org/streams</a>' xmlns:gajim='<a href="http://gajim.org/'">http://gajim.org/'</a>> <message><gajim:die/></message> </stream> or <stream:stream xmlns:stream='<a href="http://etherx.jabber.org/streams'">http://etherx.jabber.org/streams'</a>> <message xmlns:gajim='<a href="http://gajim.org/'">http://gajim.org/'</a>><gajim:die/></message> </stream> or <stream:stream xmlns:stream='<a href="http://etherx.jabber.org/streams'">http://etherx.jabber.org/streams'</a>> <message><gajim:die xmlns:gajim='<a href="http://gajim.org/'/">http://gajim.org/'/</a>></message> </stream> In these examples the gajim prefix has been defined and is therefore acceptable. <div class="gmail_quote">On Fri, Feb 29, 2008 at 2:47 PM, Sergei Golovan <<a href="mailto:sgolovan@nes.ru">sgolovan@nes.ru</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d">On 2/28/08, Fabio Forno <<a href="mailto:fabio.forno@gmail.com">fabio.forno@gmail.com</a>> wrote: > On Thu, Feb 28, 2008 at 7:56 AM, Sergei Golovan <<a href="mailto:sgolovan@nes.ru">sgolovan@nes.ru</a>> wrote: >  > >  >  It could be true if XMPP were defined as a XML subset in a consistent >  >  way (currently, XMPP doesn't require stream to be >  >  namesapce-well-formed, but allows to use XMLNS namespaces). > > > Not true: <a href="http://www.xmpp.org/rfcs/rfc3920.html" target="_blank">http://www.xmpp.org/rfcs/rfc3920.html</a>  paragraph 4.5 </div>In paragraph 11.3 you could see that the only property which server must validate is XML well-formedness. So, it is perfectly acceptable for XMPP stream not to be namespace-well-formed as defined in <a href="http://www.w3.org/TR/1999/REC-xml-names-19990114/" target="_blank">http://www.w3.org/TR/1999/REC-xml-names-19990114/</a> -- Sergei Golovan </blockquote></div> -- - Norman Rasmussen - Email: <a href="mailto:norman@rasmussen.co.za">norman@rasmussen.co.za</a> - Home page: <a href="http://norman.rasmussen.co.za/">http://norman.rasmussen.co.za/</a>