diff --git a/mail/postfix/src/opnsense/mvc/app/controllers/OPNsense/Postfix/Api/DomainController.php b/mail/postfix/src/opnsense/mvc/app/controllers/OPNsense/Postfix/Api/DomainController.php
index b64ce9f925..29c181214c 100644
--- a/mail/postfix/src/opnsense/mvc/app/controllers/OPNsense/Postfix/Api/DomainController.php
+++ b/mail/postfix/src/opnsense/mvc/app/controllers/OPNsense/Postfix/Api/DomainController.php
@@ -38,7 +38,7 @@ class DomainController extends ApiMutableModelControllerBase
 
     public function searchDomainAction()
     {
-        return $this->searchBase('domains.domain', array("enabled", "domainname", "destination"));
+        return $this->searchBase('domains.domain', array("enabled", "domainname", "transport", "destination"));
     }
 
     public function getDomainAction($uuid = null)
diff --git a/mail/postfix/src/opnsense/mvc/app/controllers/OPNsense/Postfix/forms/dialogEditPostfixDomain.xml b/mail/postfix/src/opnsense/mvc/app/controllers/OPNsense/Postfix/forms/dialogEditPostfixDomain.xml
index 128706a6cd..d3e9a30afb 100644
--- a/mail/postfix/src/opnsense/mvc/app/controllers/OPNsense/Postfix/forms/dialogEditPostfixDomain.xml
+++ b/mail/postfix/src/opnsense/mvc/app/controllers/OPNsense/Postfix/forms/dialogEditPostfixDomain.xml
@@ -11,6 +11,12 @@
         <type>text</type>
         <help>Set the unique domain name to relay for.</help>
     </field>
+    <field>
+        <id>domain.transport</id>
+        <label>Transport</label>
+        <type>text</type>
+        <help>Set the transport method. If empty, smtp will be used. https://www.postfix.org/transport.5.html</help>
+    </field>
     <field>
         <id>domain.destination</id>
         <label>Destination</label>
diff --git a/mail/postfix/src/opnsense/mvc/app/models/OPNsense/Postfix/Domain.xml b/mail/postfix/src/opnsense/mvc/app/models/OPNsense/Postfix/Domain.xml
index a4af4ed775..68b788bb6a 100644
--- a/mail/postfix/src/opnsense/mvc/app/models/OPNsense/Postfix/Domain.xml
+++ b/mail/postfix/src/opnsense/mvc/app/models/OPNsense/Postfix/Domain.xml
@@ -1,7 +1,7 @@
 <model>
     <mount>//OPNsense/postfix/domain</mount>
     <description>Postfix domain configuration</description>
-    <version>1.0.1</version>
+    <version>1.1.0</version>
     <items>
         <domains>
                 <domain type="ArrayField">
@@ -13,6 +13,12 @@
                                 <Default></Default>
                                 <Required>Y</Required>
                         </domainname>
+                        <transport type="TextField">
+                                <Default></Default>
+                                <Required>N</Required>
+                                <Mask>/^([0-9a-zA-Z.:\-\[\]]{0,63}[0-9a-zA-Z.\-\[\]])$/u</Mask>
+                                <ValidationMessage>Only 64 of the following characters are allowed: 0-9a-zA-Z.:-[] and must not end with :</ValidationMessage>
+                        </transport>
                         <destination type="TextField">
                                 <Default></Default>
                                 <Required>N</Required>
diff --git a/mail/postfix/src/opnsense/mvc/app/views/OPNsense/Postfix/domain.volt b/mail/postfix/src/opnsense/mvc/app/views/OPNsense/Postfix/domain.volt
index a98dd06557..82f0fb4ba4 100644
--- a/mail/postfix/src/opnsense/mvc/app/views/OPNsense/Postfix/domain.volt
+++ b/mail/postfix/src/opnsense/mvc/app/views/OPNsense/Postfix/domain.volt
@@ -58,6 +58,7 @@ POSSIBILITY OF SUCH DAMAGE.
             <tr>
                 <th data-column-id="enabled" data-type="string" data-formatter="rowtoggle">{{ lang._('Enabled') }}</th>
                 <th data-column-id="domainname" data-type="string" data-visible="true">{{ lang._('Domain') }}</th>
+                <th data-column-id="transport" data-type="string" data-visible="true">{{ lang._('Transport') }}</th>
                 <th data-column-id="destination" data-type="string" data-visible="true">{{ lang._('Destination') }}</th>
                 <th data-column-id="uuid" data-type="string" data-identifier="true" data-visible="false">{{ lang._('ID') }}</th>
                 <th data-column-id="commands" data-formatter="commands" data-sortable="false">{{ lang._('Commands') }}</th>            </tr>
diff --git a/mail/postfix/src/opnsense/service/templates/OPNsense/Postfix/transport b/mail/postfix/src/opnsense/service/templates/OPNsense/Postfix/transport
index 8c058a0780..2ee04b7306 100644
--- a/mail/postfix/src/opnsense/service/templates/OPNsense/Postfix/transport
+++ b/mail/postfix/src/opnsense/service/templates/OPNsense/Postfix/transport
@@ -2,7 +2,11 @@
 {%   if helpers.exists('OPNsense.postfix.domain.domains.domain') %}
 {%     for domain in helpers.toList('OPNsense.postfix.domain.domains.domain') %}
 {%       if domain.enabled == '1' %}
+{%         if domain.transport|length > 0 %}
+{{ domain.domainname }} {{domain.transport}}:{{domain.destination}}
+{%         else %}
 {{ domain.domainname }} smtp:{{ domain.destination }}
+{%         endif %}
 {%       endif %}
 {%     endfor %}
 {%   endif %}