How change fonts in sent message mail in c

In C, you can change the font of a sent message in email using a library like libcurl or libmail. Here's an example using libcurl:

First, you need to install libcurl and libmail on your system. Then, you can use the following code to send an email with a specific font:

#include <curl/curl.h>
#include <libmail/mail.h>

int main() {
    CURL *curl;
    CURLcode res;
    mail_message_t *msg;

    // Initialize libcurl
    curl_global_init(CURL_GLOBAL_DEFAULT);
    curl = curl_easy_init();
    if(curl) {
        // Set the email message
        msg = mail_message_new();
        mail_message_set_subject(msg, "Test email with font");
        mail_message_set_body(msg, "This is a test email with font <font face=\"Arial\">Arial</font> and <font face=\"Times New Roman\">Times New Roman</font>");

        // Set the email headers
        mail_message_set_from(msg, "[email protected]");
        mail_message_set_to(msg, "[email protected]");
        mail_message_set_cc(msg, "[email protected]");
        mail_message_set_bcc(msg, "[email protected]");

        // Set the email content type
        mail_message_set_content_type(msg, "text/html");

        // Send the email
        res = curl_easy_setopt(curl, CURLOPT_URL, "smtp://smtp.example.com");
        res = curl_easy_setopt(curl, CURLOPT_MAILFROM, "[email protected]");
        res = curl_easy_setopt(curl, CURLOPT_MAILRCPT, "[email protected]");
        res = curl_easy_setopt(curl, CURLOPT_MAILDATA, msg);
        res = curl_easy_perform(curl);

        // Clean up
        mail_message_free(msg);
        curl_easy_cleanup(curl);
    }
    curl_global_cleanup();
    return 0;
}

In this example, we use the mail_message_new() function to create a new email message, and then set the subject, body, from, to, cc, and bcc fields using the corresponding functions. We also set the content type to text/html to allow us to use HTML tags in the email body.

In the email body, we use HTML tags to specify the font face for specific text. In this example, we use the <font face="Arial"> and <font face="Times New Roman"> tags to specify the font face for the text "Arial" and "Times New Roman", respectively.

Finally, we use the curl_easy_setopt() function to set the URL, from, to, and mail data for the email, and then perform the email send using the curl_easy_perform() function.

Note that this is just an example, and you may need to modify the code to fit your specific use case. Additionally, the font face specified in the email body may not be supported by all email clients.