<p></p>
<p>We are seeing the same issue here with 183 replies not getting forwarded if theyu lack a Contact header. Is there a reason this is explicitly excluded from the 1xx replies:</p>
<pre><code>if(msg->first_line.u.reply.statuscode>=100
                                        && msg->first_line.u.reply.statuscode<200
                                        && msg->first_line.u.reply.statuscode!=183) {
                                /* provisional response with no mandatory contact header */
                                return 0;
                        }
</code></pre>
<p>Thanks</p>

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