C语言curl smtp发送邮件登录被拒绝

Question

C语言smtp发送邮件登录被拒绝

#include <stdio.h>
#include <Windows.h>
#include "curl/curl/curl.h"


void printTIME(){
    time_t t;
    struct tm *p;
    time(&t);
    p = localtime(&t);
    printf ("%d-%02d-%02d %02d:%02d:%02d ", (1900+p->tm_year), (1+p->tm_mon), p->tm_mday,p->tm_hour, p->tm_min, p->tm_sec);
}
 

void send_verification_code(const char* email, const char* code) {
    CURL *curl;
    CURLcode res;
    char post_data[256];
    sprintf(post_data, "from=[e-mail]&to=%s&subject=Verification Code&body=Your verification code is %s.", email, code);
    curl_global_init(CURL_GLOBAL_ALL);
    curl = curl_easy_init();
    if (curl) {
        curl_easy_setopt(curl, CURLOPT_CAINFO, "cacert.pem");
        curl_easy_setopt(curl, CURLOPT_URL, "smtp://smtp.qq.com:587");
        curl_easy_setopt(curl, CURLOPT_USERNAME, "usename");
        curl_easy_setopt(curl, CURLOPT_PASSWORD, "password");
        curl_easy_setopt(curl, CURLOPT_MAIL_FROM, "usename");
        curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, email);
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post_data);
        res = curl_easy_perform(curl);
        if (res != CURLE_OK)
            printTIME(); 
            printf("curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
        curl_easy_cleanup(curl);
    }
    curl_global_cleanup();
}

int main(void) {
    send_verification_code("to email", "123456");
    system("pause");
    return 0;

}

错误信息

Answer 1

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