--- a/src/core/ngx_connection.c
+++ b/src/core/ngx_connection.c
@@ -12,52 +12,6 @@
 ngx_os_io_t  ngx_io;
 
 
-ngx_listening_t *
-ngx_listening_inet_stream_socket(ngx_conf_t *cf, in_addr_t addr, in_port_t port)
-{
-    size_t               len;
-    ngx_listening_t     *ls;
-    struct sockaddr_in  *sin;
-
-    ls = ngx_array_push(&cf->cycle->listening);
-    if (ls == NULL) {
-        return NULL;
-    }
-
-    ngx_memzero(ls, sizeof(ngx_listening_t));
-
-    sin = ngx_pcalloc(cf->pool, sizeof(struct sockaddr_in));
-    if (sin == NULL) {
-        return NULL;
-    }
-
-    sin->sin_family = AF_INET;
-    sin->sin_addr.s_addr = addr;
-    sin->sin_port = htons(port);
-
-
-    ls->addr_text.data = ngx_pnalloc(cf->pool,
-                                    NGX_INET_ADDRSTRLEN + sizeof(":65535") - 1);
-    if (ls->addr_text.data == NULL) {
-        return NULL;
-    }
-
-    len = ngx_inet_ntop(AF_INET, &addr, ls->addr_text.data,
-                        NGX_INET_ADDRSTRLEN);
-
-    ls->addr_text.len = ngx_sprintf(ls->addr_text.data + len, ":%d", port)
-                        - ls->addr_text.data;
-
-    ls->fd = (ngx_socket_t) -1;
-    ls->type = SOCK_STREAM;
-    ls->sockaddr = (struct sockaddr *) sin;
-    ls->socklen = sizeof(struct sockaddr_in);
-    ls->addr_text_max_len = NGX_INET_ADDRSTRLEN;
-
-    return ls;
-}
-
-
 ngx_int_t
 ngx_set_inherited_sockets(ngx_cycle_t *cycle)
 {

--- a/src/core/ngx_connection.h
+++ b/src/core/ngx_connection.h
@@ -168,8 +168,6 @@ struct ngx_connection_s {
 #endif
 
 
-ngx_listening_t *ngx_listening_inet_stream_socket(ngx_conf_t *cf,
-    in_addr_t addr, in_port_t port);
 ngx_int_t ngx_set_inherited_sockets(ngx_cycle_t *cycle);
 ngx_int_t ngx_open_listening_sockets(ngx_cycle_t *cycle);
 void ngx_configure_listening_socket(ngx_cycle_t *cycle);

--- a/src/mail/ngx_mail.c
+++ b/src/mail/ngx_mail.c
@@ -72,12 +72,15 @@ ngx_mail_block(ngx_conf_t *cf, ngx_comma
     ngx_listening_t             *ls;
     ngx_mail_listen_t           *mls;
     ngx_mail_module_t           *module;
+    struct sockaddr             *sa;
+    struct sockaddr_in          *sin;
     ngx_mail_in_port_t          *mip;
     ngx_mail_conf_ctx_t         *ctx;
     ngx_mail_conf_in_port_t     *in_port;
     ngx_mail_conf_in_addr_t     *in_addr;
     ngx_mail_core_srv_conf_t   **cscfp;
     ngx_mail_core_main_conf_t   *cmcf;
+    u_char                       buf[NGX_SOCKADDR_STRLEN];
 
     if (cmd->name.data[0] == 'i') {
         ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
@@ -299,10 +302,51 @@ ngx_mail_block(ngx_conf_t *cf, ngx_comma
                 continue;
             }
 
-            ls = ngx_listening_inet_stream_socket(cf, in_addr[a].addr,
-                                                  in_port[p].port);
+            ls = ngx_array_push(&cf->cycle->listening);
             if (ls == NULL) {
-                return NGX_CONF_ERROR;
+                return NULL;
+            }
+
+            ngx_memzero(ls, sizeof(ngx_listening_t));
+
+            sin = ngx_pcalloc(cf->pool, sizeof(struct sockaddr_in));
+            if (sin == NULL) {
+                return NULL;
+            }
+
+            sin->sin_family = AF_INET;
+            sin->sin_addr.s_addr = in_addr[a].addr;
+            sin->sin_port = htons(in_port[p].port);
+
+            sa = (struct sockaddr *) sin;
+
+            ls->sockaddr = sa;
+            ls->socklen = sizeof(struct sockaddr_in);
+
+            ls->addr_text.len = ngx_sock_ntop(sa, buf, NGX_SOCKADDR_STRLEN, 1);
+
+            ls->addr_text.data = ngx_pnalloc(cf->pool, ls->addr_text.len);
+            if (ls->addr_text.data == NULL) {
+                return NULL;
+            }
+
+            ngx_memcpy(ls->addr_text.data, buf, ls->addr_text.len);
+
+            ls->fd = (ngx_socket_t) -1;
+            ls->type = SOCK_STREAM;
+
+            switch (ls->sockaddr->sa_family) {
+#if (NGX_HAVE_INET6)
+            case AF_INET6:
+                 ls->addr_text_max_len = NGX_INET6_ADDRSTRLEN;
+                 break;
+#endif
+            case AF_INET:
+                 ls->addr_text_max_len = NGX_INET_ADDRSTRLEN;
+                 break;
+            default:
+                 ls->addr_text_max_len = NGX_SOCKADDR_STRLEN;
+                 break;
             }
 
             ls->backlog = NGX_LISTEN_BACKLOG;