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authorSteve Holme <steve_holme@hotmail.com>2020-02-09 16:41:34 +0000
committerSteve Holme <steve_holme@hotmail.com>2020-02-26 14:54:51 +0000
commit34a1ffb05f3cf8efb8781627c95fffe89a1e86a1 (patch)
tree09cae56cf282e6b40f100aa00b4e0af01f1eb860 /lib
parentefce3ea5a85126d3e6c2084a7b581cc1df1b340b (diff)
smtp: Support the SMTPUTF8 extension for the EXPN command
Simply notify the server we support the SMTPUTF8 extension if it does.
Diffstat (limited to 'lib')
-rw-r--r--lib/smtp.c25
1 files changed, 16 insertions, 9 deletions
diff --git a/lib/smtp.c b/lib/smtp.c
index 362e8eae9..b3b1e83ed 100644
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -487,16 +487,16 @@ static CURLcode smtp_perform_command(struct connectdata *conn)
struct SMTP *smtp = data->req.protop;
if(smtp->rcpt) {
+ /* We notify the server we are sending UTF-8 data if a) it supports the
+ SMTPUTF8 extension and b) The mailbox contains UTF-8 charaacters, in
+ either the local address or host name parts. This is regardless of
+ whether the host name is encoded using IDN ACE */
+ bool utf8 = FALSE;
+
if((!smtp->custom) || (!smtp->custom[0])) {
char *address = NULL;
struct hostname host = { NULL, NULL, NULL, NULL };
- /* We notify the server we are sending UTF-8 data if a) it supports the
- SMTPUTF8 extension and b) The mailbox contains UTF-8 charaacters, in
- either the local address or host name parts. This is regardless of
- whether the host name is encoded using IDN ACE */
- bool utf8 = FALSE;
-
/* Parse the mailbox to verify into the local address and host name
parts, converting the host name to an IDN A-label if necessary */
result = smtp_parse_address(conn, smtp->rcpt->data,
@@ -521,10 +521,17 @@ static CURLcode smtp_perform_command(struct connectdata *conn)
Curl_free_idnconverted_hostname(&host);
free(address);
}
- else
+ else {
+ /* Establish whether we should report that we support SMTPUTF8 for EXPN
+ commands to the server as per RFC-6531 sect. 3.1 point 6 */
+ utf8 = (conn->proto.smtpc.utf8_supported) &&
+ (!strcmp(smtp->custom, "EXPN"));
+
/* Send the custom recipient based command such as the EXPN command */
- result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s %s", smtp->custom,
- smtp->rcpt->data);
+ result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s %s%s", smtp->custom,
+ smtp->rcpt->data,
+ utf8 ? " SMTPUTF8" : "");
+ }
}
else
/* Send the non-recipient based command such as HELP */