Hi, I have also observed similar behavior once. My guess is that, when you send multiple emails with the same Date, Message-ID, and Subject [this is what I did] gmail fails to recognize that there is a new message on the server.
Best wishes, Adrian czw., 29 wrz 2022 o 08:32 jian he via curl-library < curl-library@lists.haxx.se> napisał(a): > 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? > -- > Unsubscribe: https://lists.haxx.se/listinfo/curl-library > Etiquette: https://curl.se/mail/etiquette.html >
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