--- a/xml/en/docs/mail/ngx_mail_core_module.xml
+++ b/xml/en/docs/mail/ngx_mail_core_module.xml
@@ -10,7 +10,7 @@
 <module name="Module ngx_mail_core_module"
         link="/en/docs/mail/ngx_mail_core_module.html"
         lang="en"
-        rev="9">
+        rev="10">
 
 <section id="summary">
 
@@ -79,6 +79,8 @@ mail {
     <value>address</value>:<value>port</value>
     [<literal>ssl</literal>]
     [<literal>backlog</literal>=<value>number</value>]
+    [<literal>rcvbuf</literal>=<value>size</value>]
+    [<literal>sndbuf</literal>=<value>size</value>]
     [<literal>bind</literal>]
     [<literal>ipv6only</literal>=<literal>on</literal>|<literal>off</literal>]
     [<literal>so_keepalive</literal>=<literal>on</literal>|<literal>off</literal>|[<value>keepidle</value>]:[<value>keepintvl</value>]:[<value>keepcnt</value>]]</syntax>
@@ -137,6 +139,22 @@ and to 511 on other platforms.
 </tag-desc>
 
 <tag-name>
+<literal>rcvbuf</literal>=<value>size</value>
+</tag-name>
+<tag-desc>
+sets the receive buffer size
+(the <c-def>SO_RCVBUF</c-def> option) for the listening socket (1.11.13).
+</tag-desc>
+
+<tag-name>
+<literal>sndbuf</literal>=<value>size</value>
+</tag-name>
+<tag-desc>
+sets the send buffer size
+(the <c-def>SO_SNDBUF</c-def> option) for the listening socket (1.11.13).
+</tag-desc>
+
+<tag-name>
 <literal>bind</literal>
 </tag-name>
 <tag-desc>