--- a/xml/en/docs/mail/ngx_mail_smtp_module.xml	Thu Oct 27 21:02:10 2016 +0300
+++ b/xml/en/docs/mail/ngx_mail_smtp_module.xml	Mon Jan 16 12:33:15 2017 +0300
@@ -10,7 +10,7 @@
 <module name="Module ngx_mail_smtp_module"
         link="/en/docs/mail/ngx_mail_smtp_module.html"
         lang="en"
-        rev="2">
+        rev="3">
 
 <section id="directives" name="Directives">
 
@@ -43,6 +43,11 @@
 In order for this method to work, the password must be stored unencrypted.
 </tag-desc>
 
+<tag-name><literal>external</literal></tag-name>
+<tag-desc>
+<link url="http://tools.ietf.org/html/rfc4422">AUTH EXTERNAL</link> (1.11.6).
+</tag-desc>
+
 <tag-name><literal>none</literal></tag-name>
 <tag-desc>
 Authentication is not required.