https://curl.se/libcurl/c/smtp-mail.html https://stackoverflow.com/questions/37092597/sending-an-email-with-libcurl-smtp-with-gmail-login-denied
I use 465, so I follow the SO post instructions: > curl_easy_setopt(curl,CURLOPT_URL,"smtps://smtp.gmail.com:465"); > //curl_easy_setopt(curl,CURLOPT_USE_SSL,CURLUSESSL_ALL); > > Seems you cannot run this program multi times. if I run *gcc -Wall -Wextra -pedantic -Wshadow -Ofast curl_stmp1.c -lcurl &&./a.out * then the second time, it won't deliver a message. I need to constantly change the subject. 1st time subject: SMTP example messageTEST TEST01 2nd time subject: SMTP example messageTEST TEST02 not sure why?
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