Send HTML Email with Attachments

Demonstrates how to send an HTML email with file attachments.
Chilkat C Downloads

#include <C_CkMailMan.h>
#include <C_CkEmail.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkMailMan mailman;
    HCkEmail email;
    const char *contentIdStarfish;
    HCkStringBuilder sbHtml;
    int numReplacements;
    const char *content;

    success = FALSE;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    mailman = CkMailMan_Create();

    CkMailMan_putSmtpHost(mailman,"smtp.my-starttls-mail-server.com");

    CkMailMan_putSmtpUsername(mailman,"MY-SMTP-USERNAME");
    CkMailMan_putSmtpPassword(mailman,"MY-SMTP-PASSWORD");

    CkMailMan_putStartTLS(mailman,TRUE);
    CkMailMan_putSmtpPort(mailman,587);

    // Create a new email object
    email = CkEmail_Create();
    CkEmail_putSubject(email,"Test SMTP API to Send HTML Email with Attachments");
    CkEmail_putFrom(email,"Joe Programmer <joe@my-starttls-mail-server.com>");
    CkEmail_AddTo(email,"Chilkat Support","support@chilkatsoft.com");

    // Add a plain-text alternative body, which will likely never be seen.
    // (It is shown if the receiving email client is incapable of displaying HTML email.)
    CkEmail_AddPlainTextAlternativeBody(email,"This is a plain-text alternative body...");

    // Our HTML will include an image, so add the related image here.
    contentIdStarfish = CkEmail_addRelatedFile(email,"qa_data/jpg/starfish.jpg");
    if (CkEmail_getLastMethodSuccess(email) != TRUE) {
        printf("%s\n",CkEmail_lastErrorText(email));
        CkMailMan_Dispose(mailman);
        CkEmail_Dispose(email);
        return;
    }

    // The src attribute for the image tag is set to the contentIdStarfish:
    sbHtml = CkStringBuilder_Create();
    CkStringBuilder_Append(sbHtml,"<html><body><p>This is an HTML email with an embedded image.</p>");
    CkStringBuilder_Append(sbHtml,"<p><img src=\"cid:CONTENT_ID_STARFISH\" /></p></body></html>");
    numReplacements = CkStringBuilder_Replace(sbHtml,"CONTENT_ID_STARFISH",contentIdStarfish);

    CkEmail_AddHtmlAlternativeBody(email,CkStringBuilder_getAsString(sbHtml));

    // Finally, add some attachments to the email.
    // Add a file attachment.
    success = CkEmail_AddFileAttachment2(email,"qa_data/pdf/fishing.pdf","application/pdf");
    if (success != TRUE) {
        printf("%s\n",CkEmail_lastErrorText(email));
        CkMailMan_Dispose(mailman);
        CkEmail_Dispose(email);
        CkStringBuilder_Dispose(sbHtml);
        return;
    }

    // Add an attachment where the content is contained in a string.
    content = "This is the content of the 2nd attached file.";
    CkEmail_AddStringAttachment(email,"someText.txt",content);

    // Send the HTML email.
    success = CkMailMan_SendEmail(mailman,email);
    if (success != TRUE) {
        printf("%s\n",CkMailMan_lastErrorText(mailman));
        CkMailMan_Dispose(mailman);
        CkEmail_Dispose(email);
        CkStringBuilder_Dispose(sbHtml);
        return;
    }

    success = CkMailMan_CloseSmtpConnection(mailman);
    if (success != TRUE) {
        printf("Connection to SMTP server not closed cleanly.\n");
    }

    printf("HTML email with attachments sent!\n");


    CkMailMan_Dispose(mailman);
    CkEmail_Dispose(email);
    CkStringBuilder_Dispose(sbHtml);

    }