Java

Attach an Email to Another Email

Demonstrates the Chilkat Email.AttachEmail method, which attaches a copy of another email to this email object. The attached email is encapsulated in a message/rfc822 subpart. Because a copy is attached, later changes to the source email do not affect the embedded message. This example attaches one email to another.

Background: "Forward as attachment" produces exactly this structure: the original message is embedded whole as a message/rfc822 part rather than quoted into the body. This preserves the original's headers and formatting intact, which matters for forwarding to a mailbox that will re-parse it, or for reporting spam/phishing with the original evidence attached. Such parts are counted by NumAttachedMessages.

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Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    //  Demonstrates the AttachEmail method, which attaches a copy of another email to this email
    //  object.  The attached email is encapsulated in a message/rfc822 subpart.

    CkEmail innerEmail = new CkEmail();
    innerEmail.put_Subject("Original message");
    innerEmail.put_From("alice@example.com");
    innerEmail.put_Body("This is the original message being forwarded.");

    CkEmail email = new CkEmail();
    email.put_Subject("FW: Original message");
    email.put_From("bob@example.com");
    email.put_Body("See the attached original email.");

    //  Attach a copy of the inner email as a message/rfc822 part.

    success = email.AttachEmail(innerEmail);
    if (success == false) {
        System.out.println(email.lastErrorText());
        return;
        }

    System.out.println("NumAttachedMessages = " + email.get_NumAttachedMessages());
  }
}