CURLOPT_MA...ALLOWFAILS(3) Library Functions Manual CURLOPT_MA...ALLOWFAILS(3)
NAME
CURLOPT_MAIL_RCPT_ALLOWFAILS - allow RCPT TO command to fail for some
recipients
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAIL_RCPT_ALLOWFAILS,
long allow);
DESCRIPTION
If allow is set to 1L, allow RCPT TO command to fail for some recipi-
ents.
When sending data to multiple recipients, by default curl aborts the
SMTP conversation if either one of the recipients causes the RCPT TO
command to return an error.
The default behavior can be changed by setting allow to 1L which makes
libcurl ignore errors for individual recipients and proceed with the re-
maining accepted recipients.
If all recipients trigger RCPT TO failures and this flag is specified,
curl aborts the SMTP conversation and returns the error received from to
the last RCPT TO command.
DEFAULT
0
PROTOCOLS
This functionality affects smtp only
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
struct curl_slist *list;
CURLcode res;
/* Adding one valid and one invalid email address */
list = curl_slist_append(NULL, "person@example.com");
list = curl_slist_append(list, "invalidemailaddress");
curl_easy_setopt(curl, CURLOPT_URL, "smtp://example.com/");
curl_easy_setopt(curl, CURLOPT_MAIL_RCPT_ALLOWFAILS, 1L);
res = curl_easy_perform(curl);
curl_slist_free_all(list);
curl_easy_cleanup(curl);
}
}
HISTORY
This option was called CURLOPT_MAIL_RCPT_ALLLOWFAILS (with three instead
of two letter L) before 8.2.0
AVAILABILITY
Added in curl 8.2.0
RETURN VALUE
curl_easy_setopt(3) returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred,
see libcurl-errors(3).
SEE ALSO
CURLOPT_MAIL_FROM(3), CURLOPT_MAIL_RCPT(3)
libcurl 2026-07-12 CURLOPT_MA...ALLOWFAILS(3)
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