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-rw-r--r--lib/smtp.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/smtp.c b/lib/smtp.c
index f82c8aac2..a5b3bf8c6 100644
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -234,8 +234,11 @@ static bool smtp_endofresp(struct connectdata *conn, char *line, size_t len,
if(len < 4 || !ISDIGIT(line[0]) || !ISDIGIT(line[1]) || !ISDIGIT(line[2]))
return FALSE; /* Nothing for us */
- /* Do we have a command response? */
- result = (line[3] == ' ') ? TRUE : FALSE;
+ /* Do we have a command response? This should be the response code followed
+ by a space and optionally some text as per RFC-5321 and as outlined in
+ Section 4. Examples of RFC-4954 but some e-mail servers ignore this and
+ only send the response code instead. */
+ result = (line[3] == ' ' || len == 5) ? TRUE : FALSE;
if(result)
*resp = curlx_sltosi(strtol(line, NULL, 10));