Hi I try to realize simple code on perl which should just get/send messages from/to gtalk accounts. I use Net::XMPP::* modules. All works just fine for users, who are my friends (in my "buddy" list). But i can't send message to unknown user. I know, that for this case i must send an invitation first, but Net::XMPP::* don't provide this possibility. There is only one way to invite person - construct my own xml according to "XEP-0155 Stanza Session Negotiation" protocol. But this doesn't work correct. When i send xml to server, it returns error "service-unavailable". I send: <message to='[email protected]'> <sxde xmlns='http://jabber.org/protocol/sxde' xmlns:sxde='http://jabber.org/protocol/sxde#metadata' session='0AEF4278DC4B6577' id='b'> <negotiation> <invitation> <feature var='http://jabber.org/protocol/whiteboard' /> </invitation> </negotiation> </sxde> </message> before my message. ANSWER: <message from='' to='[email protected]/TALKCDDCCE63' type='error'> <sxde id='b' session='0AEF4278DC4B6577' xmlns='http://jabber.org/protocol/sxde' xmlns:sxde='http://jabber.org/protocol/sxde#metadata'> <negotiation> <invitation> <feature var='http://jabber.org/protocol/whiteboard'/> </invitation> </negotiation> </sxde> <nos:x value='disabled' xmlns:nos='google:nosave'/> <arc:record otr='false' xmlns:arc='http://jabber.org/protocol/archive'/> <error code='503' type='cancel'> <service-unavailable xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/> </error> </message> Maybe i lost smth or should send another info before (or after..) ? Or maybe there are another way to send message without any invitation? Thanks in advance