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-rw-r--r--win32/sendmail.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/win32/sendmail.c b/win32/sendmail.c
index c71ab2201f..62d710589d 100644
--- a/win32/sendmail.c
+++ b/win32/sendmail.c
@@ -677,8 +677,12 @@ static int PostHeader(char *RPath, char *Subject, char *mailTo, char *xheaders)
size_t i;
if (xheaders) {
+ size_t headers_lc_len;
+
headers_lc = estrdup(xheaders);
- for (i = 0; i < strlen(headers_lc); i++) {
+ headers_lc_len = strlen(headers_lc);
+
+ for (i = 0; i < headers_lc_len; i++) {
headers_lc[i] = tolower(headers_lc[i]);
}
}