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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Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Email;

public class ChilkatExample {

    public static void main(String[] args) {
        // 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.

        Email innerEmail = new Email();
        innerEmail.setSubject("Original message");
        innerEmail.setFrom("alice@example.com");
        innerEmail.setBody("This is the original message being forwarded.");

        Email email = new Email();
        email.setSubject("FW: Original message");
        email.setFrom("bob@example.com");
        email.setBody("See the attached original email.");

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

        try {
            email.attachEmail(innerEmail);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

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