X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/9427e87923288dfe6fdf80011f77bf4a135898ac..a5ffa9b475a426bc73366db01f7cc92a3811bc3a:/src/src/utf8.c

diff --git a/src/src/utf8.c b/src/src/utf8.c
index be5bcb078..7b7b88f66 100644
--- a/src/src/utf8.c
+++ b/src/src/utf8.c
@@ -52,6 +52,10 @@ uschar * s1, * s;
 int rc;
 
 #ifdef SUPPORT_I18N_2008
+/* Avoid lowercasing plain-ascii domains */
+if (!string_is_utf8(utf8))
+  return string_copy(utf8);
+
 /* Only lowercase is accepted by the library call.  A pity since we lose
 any mixed-case annotation.  This does not really matter for a domain. */
   {
@@ -198,7 +202,7 @@ return NULL;
 /* Whole address conversion.
 The *err string pointer should be null before the call.
 
-Return NULL on oeeror, with (optional) errstring pointer filled in
+Return NULL on error, with (optional) errstring pointer filled in
 */
 
 uschar *