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authorSteve Holme <steve_holme@hotmail.com>2020-02-13 22:39:28 +0000
committerSteve Holme <steve_holme@hotmail.com>2020-02-26 14:54:51 +0000
commit483edeb8dda80406f56480965d3c649bb3b2e77b (patch)
tree6289d980b723e76d30f4e4e1eac776b2bf20fb6e /lib
parentaba1bf630f13a77b1a92484feb365a29bb1a25da (diff)
smtp: Support the SMTPUTF8 extension in the RCPT TO command
Note: The RCPT TO command isn't required to advertise to the server that it contains UTF-8 characters, instead the server is told that a mail may contain UTF-8 in any envelope command via the MAIL command.
Diffstat (limited to 'lib')
-rw-r--r--lib/smtp.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/lib/smtp.c b/lib/smtp.c
index cdeeb7a26..ef51c829a 100644
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -670,6 +670,23 @@ static CURLcode smtp_perform_mail(struct connectdata *conn)
}
}
+ /* If the mailboxes in the FROM and AUTH parameters don't include a UTF-8
+ based address then quickly scan through the recipient list and check if
+ any there do, as we need to correctly identify our support for SMTPUTF8
+ in the envelope, as per RFC-6531 sect. 3.4 */
+ if(conn->proto.smtpc.utf8_supported && !utf8) {
+ struct SMTP *smtp = data->req.protop;
+ struct curl_slist *rcpt = smtp->rcpt;
+
+ while(rcpt && !utf8) {
+ /* Does the host name contain non-ASCII characters? */
+ if(!Curl_is_ASCII_name(rcpt->data))
+ utf8 = TRUE;
+
+ rcpt = rcpt->next;
+ }
+ }
+
/* Send the MAIL command */
result = Curl_pp_sendf(&conn->proto.smtpc.pp,
"MAIL FROM:%s%s%s%s%s%s",
@@ -679,7 +696,7 @@ static CURLcode smtp_perform_mail(struct connectdata *conn)
size ? " SIZE=" : "", /* Optional on SIZE support */
size ? size : "", /* */
utf8 ? " SMTPUTF8" /* Internationalised mailbox */
- : ""); /* address included */
+ : ""); /* included in our envelope */
free(from);
free(auth);