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Yes I did actually, I didn't remove it completely but gave an exception in the vein of -</div>
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<span>event_route[topoh:msg-outgoing] {<br>
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<div> if($sndto(ip)=="10.1.1.10") {<br>
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<span><br>
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<span>Thanks Daniel and Henning!</span></div>
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<span>Edward</span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Henning Westerholt <hw@skalatan.de><br>
<b>Sent:</b> Monday, March 30, 2020 9:40 PM<br>
<b>To:</b> Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>; sr-users@lists.sip-router.org <sr-users@lists.sip-router.org><br>
<b>Cc:</b> Edward Romanenco <edward@telemessage.com><br>
<b>Subject:</b> RE: Kamailio breaks RFC's 'Contact Header'</font>
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<p class="x_MsoNormal"><span style="">Hello,</span></p>
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<p><span lang="EN-GB">Quoting from the bug report, where Daniel already replied:</span></p>
<p><span lang="EN-GB"> </span></p>
<p><span lang="EN-GB">It looks like you are using topoh module, which has the purpose of changing the headers that contain ip addresses. Remove it from your config.</span></p>
<p><span lang="EN-GB"> </span></p>
<p><span lang="EN-GB">Have you tried already to deactivate this module in your cfg?</span></p>
<p><span lang="EN-GB"> </span></p>
<p><span lang="EN-GB">Cheers,</span></p>
<p><span lang="EN-GB"> </span></p>
<p><span lang="EN-GB">Henning</span></p>
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<p class="x_MsoNormal"><span lang="EN-GB" style="">-- </span></p>
<p class="x_MsoNormal"><span lang="EN-GB" style="">Henning Westerholt </span><span style=""><a href="https://skalatan.de/blog/"><span lang="EN-GB" style="color:#0563C1">https://skalatan.de/blog/</span></a></span><span lang="EN-GB" style=""></span></p>
<p class="x_MsoNormal"><span lang="EN-GB" style="">Kamailio services </span><span style=""><a href="https://gilawa.com/"><span lang="EN-GB" style="color:#0563C1">https://gilawa.com</span></a></span><span style="">
<span lang="EN-GB"></span></span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><b>From:</b> sr-users <sr-users-bounces@lists.kamailio.org>
<b>On Behalf Of </b>Edward Romanenco<br>
<b>Sent:</b> Sunday, March 29, 2020 2:51 PM<br>
<b>To:</b> sr-users@lists.sip-router.org<br>
<b>Subject:</b> [SR-Users] Kamailio breaks RFC's 'Contact Header'</p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><b><span style="font-size:12.0pt; font-family:"inherit",serif; color:black">Description</span></b><span style="font-size:12.0pt; color:black"></span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">I'm running Kamailio 5.2.0, whenever I relay an invite via Kamailio, my original contact header is changed from the original:</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black"><a href="sip:+XXXXXXXXX@YYY.YYY.YYY.YYYY:5060;transport=udp;gw=netvision">sip:+XXXXXXXXX@YYY.YYY.YYY.YYYY:5060;transport=udp;gw=netvision</a></span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black"><a href="sip:YYY.YYY.YYY.YYY;line=sr-.n274i0TMfsHMcCAlVyAMV5IlgCXvV8n4edQlgIUlgKQ4Vk74gI1LmZ69NM79FZAR3JC.cDNLfHUj3Wnp3MP9nd*">sip:YYY.YYY.YYY.YYY;line=sr-.n274i0TMfsHMcCAlVyAMV5IlgCXvV8n4edQlgIUlgKQ4Vk74gI1LmZ69NM79FZAR3JC.cDNLfHUj3Wnp3MP9nd*</a>.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Even when I set it correctly on my route, using:</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">remove_hf("Contact");</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">append_hf("Contact:
<a href="sip:$tU@YYY.YYY.YYY.YYY:5060;transport=udp;gw=netvision\r\n">sip:$tU@YYY.YYY.YYY.YYY:5060;transport=udp;gw=netvision\r\n</a>", "Contact");</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">It still ends up being modified. </span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">What can I do to keep the contact header as it is?</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><b><span style="font-size:12.0pt; color:black">SIP Traffic</span></b><span style="font-size:12.0pt; color:black"></span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">U YYY.YYY.YYY.YYY:5060 -> 81.24.193.248:5060</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">INVITE
<a href="sip:+442033202609@81.24.193.248:5060">sip:+442033202609@81.24.193.248:5060</a> SIP/2.0.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Record-Route: <<a href="sip:YYY.YYY.YYY.YYY;r2=on;lr=on;ftag=mp0S9yH11vryH;vsf=AAAAAAAAAAAAAAAAAAAAAAADCAEACRgPGB8AAy4xNjM-">sip:YYY.YYY.YYY.YYY;r2=on;lr=on;ftag=mp0S9yH11vryH;vsf=AAAAAAAAAAAAAAAAAAAAAAADCAEACRgPGB8AAy4xNjM-</a>>.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Record-Route: <<a href="sip:2YYY.YYY.YYY.YYY;line=sr-.n274V8TlidQMVyUlg87vV8nlfDXlVHB9VD0.VHB9VDoLGtNRbH7ltlTEkyQl3jXEky1LNMoRkt5ukt5ukt5ukt5ukt5ukt5ukt5ukt5W8M5WktckoLuWAsduktTMm64pCAD">sip:2YYY.YYY.YYY.YYY;line=sr-.n274V8TlidQMVyUlg87vV8nlfDXlVHB9VD0.VHB9VDoLGtNRbH7ltlTEkyQl3jXEky1LNMoRkt5ukt5ukt5ukt5ukt5ukt5ukt5ukt5W8M5WktckoLuWAsduktTMm64pCAD</a>>.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Via: SIP/2.0/UDP YYY.YYY.YYY.YYY;branch=z9hG4bK53e9.308596b23ed683368534c9d609dce0f6.0.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Via: SIP/2.0/UDP YYY.YYY.YYY.YYY;branch=z9hG4bKsr-kA2uvfsUlerJWtIylgCXvV8n4edQlgIUlgKQ4Vk74gI1.oJVjb2njburlgCXvV8n4edQlgIUlgKQ4HWsRbWPLVDX.GrXLcAHlcC74nZXKbTVpcHh4b6mMGZvJgLsLcJTkgtGu2PGgy**.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Max-Forwards: 67.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">From: +18702935016 <<a href="sip:+18702935016@YYY.YYY.YYY.YYY">sip:+18702935016@YYY.YYY.YYY.YYY</a>>;tag=mp0S9yH11vryH.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">To: <<a href="sip:+442033202609@81.24.193.248">sip:+442033202609@81.24.193.248</a>>.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Call-ID: !!:jbkfMgyHjbsDjblfjqAQlVldvgyHKolDlcIHlcknKVIdjcIT.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">CSeq: 18182498 INVITE.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Contact: <<a href="sip:YYY.YYY.YYY.YYY;line=sr-.n274i0TMfsHMcCAlVyAMV5IlgCXvV8n4edQlgIUlgKQ4Vk74gI1LmZ69NM79FZAR3JC.cDNLfHUj3Wnp3MP9nd*">sip:YYY.YYY.YYY.YYY;line=sr-.n274i0TMfsHMcCAlVyAMV5IlgCXvV8n4edQlgIUlgKQ4Vk74gI1LmZ69NM79FZAR3JC.cDNLfHUj3Wnp3MP9nd*</a>>.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">User-Agent: FreeSWITCH-mod_sofia/1.9.0+git~20180706T160334Z~de3df8dc0e~64bit.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Allow-Events: talk, hold, conference, refer.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Content-Type: application/sdp.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Content-Disposition: session.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Content-Length: 224.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">Remote-Party-ID: "+18702935016" <<a href="sip:+18702935016@YYY.YYY.YYY.YYY">sip:+18702935016@YYY.YYY.YYY.YYY</a>>;party=calling;screen=yes;privacy=off.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">v=0.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">o=FreeSWITCH 1585439298 1585439299 IN IP4 ZZZ.ZZZ.ZZZ.ZZZ.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">s=FreeSWITCH.</span></p>
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<p class="x_MsoNormal" style="margin-left:35.4pt"><span style="font-size:12.0pt; color:black">c=IN IP4 ZZZ.ZZZ</span></p>
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