X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/1e1ddfac79fbcd052f199500a6493c7f79cb8462..a85c067ba6c6940512cf57ec213277a370d87e70:/src/src/auths/dovecot.c

diff --git a/src/src/auths/dovecot.c b/src/src/auths/dovecot.c
index 3331cb856..ed56ab8cd 100644
--- a/src/src/auths/dovecot.c
+++ b/src/src/auths/dovecot.c
@@ -1,6 +1,7 @@
 /*
+ * Copyright (c) The Exim Maintainers 2006 - 2022
  * Copyright (c) 2004 Andrey Panin <pazke@donpac.ru>
- * Copyright (c) 2006-2020 The Exim Maintainers
+ * SPDX-License-Identifier: GPL-2.0-or-later
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published
@@ -275,11 +276,20 @@ if (cctx.sock < 0)
 # ifndef DISABLE_TLS
 if (ob->server_tls)
   {
-  uschar * s;
+  union sockaddr_46 interface_sock;
+  EXIM_SOCKLEN_T size = sizeof(interface_sock);
   smtp_connect_args conn_args = { .host = &host };
-  tls_support tls_dummy = {.sni=NULL};
+  tls_support tls_dummy = { .sni = NULL };
   uschar * errstr;
 
+  if (getsockname(cctx->sock, (struct sockaddr *) &interface_sock, &size) == 0)
+    conn_args.sending_ip_address = host_ntoa(-1, &interface_sock, NULL, NULL);
+  else
+    {
+    *errmsg = string_sprintf("getsockname failed: %s", strerror(errno));
+    goto bad;
+    }
+
   if (!tls_client_start(&cctx, &conn_args, NULL, &tls_dummy, &errstr))
     {
     auth_defer_msg = string_sprintf("TLS connect failed: %s", errstr);