<p>Thanks for that tip, alex. Where is the full doc for mod_chat anyway?</p>
<div class="gmail_quote">On Jan 14, 2013 5:19 PM, &quot;Carlos Flor&quot; &lt;<a href="mailto:jackal@cybershroud.net">jackal@cybershroud.net</a>&gt; wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Alex,<div><br></div><div>You need to set blocking=true in the chatplan.  This will include a Delivery-Failure=true/false header in the event that is generated when you send the message.  You will need to have an ESL client parse that field to determine next steps.</div>


<div><br></div><div>If you don&#39;t explicitly set blocking to true, then FS doesn&#39;t wait for a response and so it has no way of knowing if the message was delivered or not.  For that reason, the Delivery-Failure header is not present in the event when in non-blocking mode.</div>


</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Jan 14, 2013 at 6:53 AM, Pip Live <span dir="ltr">&lt;<a href="mailto:itispip-qq@hotmail.com" target="_blank">itispip-qq@hotmail.com</a>&gt;</span> wrote:<br>


<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi, I use Freeswitch to handle SIP message between SIP extentions, how can server know does the message be received by client or not? I noticed even if a SIP extention is offline/unregister, SIP message will still be sent by server but just the receiver will never get it (even if later the receiver online/registered again).<div>



<br></div><div>What I want to achieve is: send SIP message to an extention, if received OK, nothing happen; if not, forward the message to user&#39;s email address.</div><div><br></div><div>brgds, Alex</div>
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