sendmail: don't add To: header if it already exists

If the message we are sending already has To: header, don't add a new one.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/mailutils/sendmail.c b/mailutils/sendmail.c
index 22f735b3d..36a1b97cb 100644
--- a/mailutils/sendmail.c
+++ b/mailutils/sendmail.c
@@ -187,6 +187,7 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
                 HDR_BCC,
         } last_hdr = 0;
         int check_hdr;
+        int has_to = 0;
 
         enum {
         //--- standard options
@@ -348,8 +349,10 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
 
                 // analyze headers
                 // To: or Cc: headers add recipients
+                check_hdr = 0 == strncasecmp("To:", s, 3);
+                has_to |= check_hdr;
                 if (opts & OPT_t) {
-                        if (0 == strncasecmp("To:", s, 3) || 0 == strncasecmp("Bcc:" + 1, s, 3)) {
+                        if (check_hdr || 0 == strncasecmp("Bcc:" + 1, s, 3)) {
                                 rcptto_list(s+3);
                                 last_hdr = HDR_TOCC;
                                 goto addheader;
@@ -391,7 +394,9 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
                                 rcptto(t);
                                 //if (MAX_HEADERS && ++nheaders >= MAX_HEADERS)
                                 //      goto bail;
-                                llist_add_to_end(&list, xasprintf("To: %s", t));
+                                if (!has_to)
+                                        llist_add_to_end(&list,
+                                                        xasprintf("To: %s", t));
                                 argv++;
                         }
                         // enter "put message" mode