nginx 0.7.58 *) Feature: a "listen" directive of the mail proxy module supports IPv6. *) Feature: the "image_filter_jpeg_quality" directive. *) Feature: the "client_body_in_single_buffer" directive. *) Feature: the $request_body variable. *) Bugfix: in ngx_http_autoindex_module in file name links having a ":" symbol in the name. *) Bugfix: "make upgrade" procedure did not work; the bug had appeared in 0.7.53. Thanks to Denis F. Latypoff.

--- a/src/mail/ngx_mail_smtp_handler.c
+++ b/src/mail/ngx_mail_smtp_handler.c
@@ -66,6 +66,12 @@ ngx_mail_smtp_init_session(ngx_mail_sess
         return;
     }
 
+    if (c->sockaddr->sa_family != AF_INET) {
+        s->host = smtp_tempunavail;
+        ngx_mail_smtp_greeting(s, c);
+        return;
+    }
+
     c->log->action = "in resolving client address";
 
     ctx = ngx_resolve_start(cscf->resolver, NULL);