diff --git a/mail/postfix/Makefile b/mail/postfix/Makefile
index 443b79cf3..cecd43ede 100644
--- a/mail/postfix/Makefile
+++ b/mail/postfix/Makefile
@@ -1,5 +1,5 @@
 PLUGIN_NAME=		postfix
-PLUGIN_VERSION=		1.2
+PLUGIN_VERSION=		1.3
 PLUGIN_COMMENT=		SMTP mail relay
 PLUGIN_DEPENDS=		postfix-sasl
 PLUGIN_MAINTAINER=	m.muenz@gmail.com
diff --git a/mail/postfix/src/opnsense/mvc/app/controllers/OPNsense/Postfix/forms/general.xml b/mail/postfix/src/opnsense/mvc/app/controllers/OPNsense/Postfix/forms/general.xml
index 0a7480b50..d94958ff7 100644
--- a/mail/postfix/src/opnsense/mvc/app/controllers/OPNsense/Postfix/forms/general.xml
+++ b/mail/postfix/src/opnsense/mvc/app/controllers/OPNsense/Postfix/forms/general.xml
@@ -29,6 +29,20 @@
         <type>text</type>
         <help>The 'Listen IPs' parameter specifies the IP address to listen to. Default is to listen on all interfaces.</help>
     </field>
+    <field>
+        <id>general.bind_address</id>
+        <label>Bind SMTP Client Address</label>
+        <type>text</type>
+        <advanced>true</advanced>
+        <help>Specify the IPv4 address the server should bind to for outgoing connections. In most cases empty is fine.</help>
+    </field>
+    <field>
+        <id>general.bind_address6</id>
+        <label>Bind SMTP Client v6 Address</label>
+        <type>text</type>
+        <advanced>true</advanced>
+        <help>Specify the IPv6 address the server should bind to for outgoing connections. In most cases empty is fine.</help>
+    </field>
     <field>
         <id>general.mynetworks</id>
         <label>Trusted Networks</label>
diff --git a/mail/postfix/src/opnsense/mvc/app/models/OPNsense/Postfix/General.xml b/mail/postfix/src/opnsense/mvc/app/models/OPNsense/Postfix/General.xml
index 4cc93b3db..ada619c2a 100644
--- a/mail/postfix/src/opnsense/mvc/app/models/OPNsense/Postfix/General.xml
+++ b/mail/postfix/src/opnsense/mvc/app/models/OPNsense/Postfix/General.xml
@@ -23,6 +23,14 @@
             <default>all</default>
             <Required>Y</Required>
         </inet_interfaces>
+        <bind_address type="NetworkField">
+            <Required>N</Required>
+            <AddressFamily>ipv4</AddressFamily>
+        </bind_address>
+        <bind_address6 type="NetworkField">
+            <Required>N</Required>
+            <AddressFamily>ipv6</AddressFamily>
+        </bind_address6>
         <mynetworks type="CSVListField">
             <default>127.0.0.0/8,[::ffff:127.0.0.0]/104,[::1]/128</default>
             <Required>Y</Required>
diff --git a/mail/postfix/src/opnsense/service/templates/OPNsense/Postfix/main.cf b/mail/postfix/src/opnsense/service/templates/OPNsense/Postfix/main.cf
index 58a9d1abe..035a07009 100644
--- a/mail/postfix/src/opnsense/service/templates/OPNsense/Postfix/main.cf
+++ b/mail/postfix/src/opnsense/service/templates/OPNsense/Postfix/main.cf
@@ -55,6 +55,12 @@ inet_interfaces = {{ OPNsense.postfix.general.inet_interfaces }}
 {% else %}
 inet_interfaces = all
 {% endif %}
+{% if helpers.exists('OPNsense.postfix.general.bind_address') and OPNsense.postfix.general.bind_address != '' %}
+smtp_bind_address = {{ OPNsense.postfix.general.bind_address }}
+{% endif %}
+{% if helpers.exists('OPNsense.postfix.general.bind_address6') and OPNsense.postfix.general.bind_address6 != '' %}
+smtp_bind_address6 = {{ OPNsense.postfix.general.bind_address6 }}
+{% endif %}
 {% if helpers.exists('OPNsense.postfix.general.mynetworks') and OPNsense.postfix.general.mynetworks != '' %}
 mynetworks = {{ OPNsense.postfix.general.mynetworks.replace(',', ' ') }}
 {% else %}