diff --git a/reference/info/functions/ini-set.xml b/reference/info/functions/ini-set.xml
index 22c0a59b9f..49c9235847 100644
--- a/reference/info/functions/ini-set.xml
+++ b/reference/info/functions/ini-set.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.6 $ -->
+<!-- $Revision: 1.7 $ -->
 <!-- splitted from ./en/functions/info.xml, last change in rev 1.23 -->
   <refentry id="function.ini-set">
    <refnamediv>
@@ -1127,6 +1127,11 @@
            <entry>"localhost"</entry>
            <entry>PHP_INI_ALL</entry>
           </row>
+          <row>
+           <entry>smtp_port</entry>
+           <entry>25</entry>
+           <entry>PHP_INI_ALL</entry>
+          </row>
           <row>
            <entry>browscap</entry>
            <entry>NULL</entry>
diff --git a/reference/mail/reference.xml b/reference/mail/reference.xml
index fe0671e72a..76a2940cf5 100644
--- a/reference/mail/reference.xml
+++ b/reference/mail/reference.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.3 $ -->
+<!-- $Revision: 1.4 $ -->
  <reference id="ref.mail">
   <title>Mail functions</title>
   <titleabbrev>Mail</titleabbrev>
@@ -18,9 +18,23 @@
      </term>
      <listitem>
       <para>
-       DNS name or IP address of the SMTP server PHP under Windows
-       should use for mail sent with the <function>mail</function>
-       function.
+       Used under Windws only: DNS name or IP address of the SMTP server PHP
+       should use for mail sent with the <function>mail</function> function.
+      </para>
+     </listitem>
+    </varlistentry>
+
+    <varlistentry id="ini.smtp-port">
+     <term>
+      <parameter>SMTP</parameter>
+      <type>int</type>
+     </term>
+     <listitem>
+      <para>
+       Used under Windws only: Number of the port to connect to the server
+       specified with the <literal>SMTP</literal> setting when sending mail
+       with <function>mail</function>; defaults to 25. Only available since
+       <literal>PHP</literal> 4.3.0.
       </para>
      </listitem>
     </varlistentry>