Send S/MIME Signed Email

Send digitally signed email using the digital certificate of the recipient. To successfully sign, the sender's certificate must be pre-installed with private key. Typically, this is done via a .pfx file, or through Internet Explorer. If your code is going to run within ASP, ASP.NET, or a Windows Service, you will need to follow the instructions here (http://blog.chilkatsoft.com/?p=149) to import your certificate w/ private key such that it is accessible by the calling process.

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// Needs #include <CkMailMan.h>
// Needs #include <CkEmail.h>

    CkString strOut;

    //  The mailman object is used for sending and receiving email.
    CkMailMan mailman;

    //  Any string argument automatically begins the 30-day trial.
    bool success;
    success = mailman.UnlockComponent("30-day trial");
    if (success != true) {
        strOut.append("Component unlock failed\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Set the SMTP server.
    mailman.put_SmtpHost("smtp.chilkatsoft.com");

    mailman.put_SmtpUsername("myLogin");
    mailman.put_SmtpPassword("myPassword");

    //  Create a new email object
    CkEmail email;

    email.put_Subject("This email is signed");
    email.put_Body("This is a digitally signed mail");
    email.put_From("Chilkat Support <admin@chilkatsoft.com>");
    email.AddTo("Test","test@testemail.net");

    //  In this example, we've already installed the certificate for "admin@chilkatsoft.com"
    //  (with private key) in the current user's personal certificate store.
    //  If the email.SendSigned property is set, Chilkat will
    //  automatically search for and use the first non-expired certificate
    //  matching the sender's email address.  Chilkat searches
    //  the Current User's Personal certificate store, as well
    //  as the Local Machine's Personal certificate store.
    //  Run certmgr.msc to view the certs in the Current User's
    //  certificate store.
    email.put_SendSigned(true);

    success = mailman.SendEmail(email);
    if (success != true) {
        strOut.append(mailman.lastErrorText());
        strOut.append("\r\n");
    }
    else {
        strOut.append(mailman.lastErrorText());
        strOut.append("\r\n");
        strOut.append("Mail Sent!\r\n");
    }


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());