C#

Example to Add Several BCC Email Recipients

See more Email Object Examples

Demonstrates how to call AddBCC once per email recipient. C#

bool success = false;

Chilkat.Email email = new Chilkat.Email();

email.Subject = "Test email subject";
email.Body = "Test email body";

email.From = "Test <joe@example.com>";

//  Add a primary TO recipient
email.AddTo("Elizabeth","elizabeth@example.com");

//  Add a CC recipient.
email.AddCC("Jerry","jerry@example.com");

//  Add 2 BCC recipients.
email.AddBcc("Mira","mira@example.com");
email.AddBcc("Alexander","alex@example.com");

//  BCC recipients will not be present in the MIME of the email that is sent.
//  However, the BCC recipients are included in the recipients provided to the SMTP server
//  during the SMTP protocol conversation. This will be shown below.

//  First, let's look at the MIME.
Debug.WriteLine(email.GetMime());

//  MIME-Version: 1.0
//  Date: Sat, 30 Oct 2021 07:58:32 -0500
//  Message-ID: <183D5F51163BE4374B494D2ED067DE2783CC761B@SLICE>
//  Content-Type: text/plain; charset=us-ascii; format=flowed
//  Content-Transfer-Encoding: 7bit
//  X-Priority: 3 (Normal)
//  Subject: Test email subject
//  From: Test <joe@example.com>
//  To: Elizabeth <elizabeth@example.com>
//  Cc: Jerry <jerry@example.com>
//  
//  Test email body

//  Notice that the BCC recipients do not appear in the MIME.  But don't worry, they are still present within the email object.
//  The difference between CC and BCC recipients is that CC recipients appear in the MIME.  Thus, the recipient of the email
//  can see the CC recipients, but cannot see and is unaware of the BCC recipients.

//  ----------------------------------------------------------------------------------------------
//  Let's send the above email and examine the SMTP session log to show that the BCC recipients also receive the email.

Chilkat.MailMan mailman = new Chilkat.MailMan();

mailman.SmtpHost = "smtp.example.com";
mailman.SmtpUsername = "myUsername";
mailman.SmtpPassword = "myPassword";
mailman.SmtpSsl = true;
mailman.SmtpPort = 465;

success = mailman.SendEmail(email);
if (success != true) {
    Debug.WriteLine(mailman.LastErrorText);
    return;
}

success = mailman.CloseSmtpConnection();
if (success != true) {
    Debug.WriteLine("Connection to SMTP server not closed cleanly.");
}

Debug.WriteLine("Mail Sent!");

//  Examine the SMTP session log.
Debug.WriteLine(mailman.SmtpSessionLog);

//  Here you can see the session log and the BCC email addresses included in the "RCPT TO" commands.

//  220 smtp.example.com ESMTP Example SMTP Service
//  EHLO SLICE<CRLF>
//  250-smtp.example.com
//  250-8BITMIME
//  250-AUTH PLAIN LOGIN
//  250 Ok
//  AUTH LOGIN<CRLF>
//  334 VXNlcm5hbWU6
//  ***<CRLF>
//  334 UGFzc3dvcmQ6
//  {PasswordOrCredentials}
//  235 Authentication successful.
//  MAIL FROM:<joe@example.com><CRLF>
//  250 Ok
//  RCPT TO:<elizabeth@example.com><CRLF>
//  250 Ok
//  RCPT TO:<jerry@example.com><CRLF>
//  250 Ok
//  RCPT TO:<mira@example.com><CRLF>
//  250 Ok
//  RCPT TO:<alex@example.com><CRLF>
//  250 Ok
//  DATA<CRLF>
//  354 End data with <CR><LF>.<CR><LF>
//  {388 bytes}
//  <CRLF>.<CRLF>
//  250 Ok
//  QUIT<CRLF>
//  221 Bye