X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/c9771b0f607127d89018dd79bab6febb14db3d6d..bd0f95ded48f560cb1f9f8b808e1abaabeb4d4ec:/src/src/spool_out.c

diff --git a/src/src/spool_out.c b/src/src/spool_out.c
index 713584091..9c5e8eb33 100644
--- a/src/src/spool_out.c
+++ b/src/src/spool_out.c
@@ -5,6 +5,7 @@
 /* Copyright (c) The Exim Maintainers 2020 - 2022 */
 /* Copyright (c) University of Cambridge 1995 - 2018 */
 /* See the file NOTICE for conditions of use and distribution. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 /* Functions for writing spool files, and moving them about. */
 
@@ -191,7 +192,7 @@ if (sender_helo_name) spool_var_write(fp, US"helo_name", sender_helo_name);
 if (sender_host_address)
   {
   if (is_tainted(sender_host_address)) putc('-', fp);
-  fprintf(fp, "-host_address %s.%d\n", sender_host_address, sender_host_port);
+  fprintf(fp, "-host_address [%s]:%d\n", sender_host_address, sender_host_port);
   if (sender_host_name)
     spool_var_write(fp, US"host_name", sender_host_name);
   }
@@ -205,7 +206,7 @@ if (sender_host_auth_pubname)
 if (interface_address)
   {
   if (is_tainted(interface_address)) putc('-', fp);
-  fprintf(fp, "-interface_address %s.%d\n", interface_address, interface_port);
+  fprintf(fp, "-interface_address [%s]:%d\n", interface_address, interface_port);
   }
 
 if (smtp_active_hostname != primary_hostname)