(Java) Send Email with Multiple Reply-To Addresses

Send email with multiple repy-to addresses.

Note: Some mail servers will remove the extra email addresses from the Reply-To header. Even if you provide multiple reply-to addresses, the email may arrive with only the 1st.

Chilkat Java Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux, Solaris Java Libs for Android

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

    CkMailMan mailman = new CkMailMan();

    mailman.put_SmtpHost("smtp.my_mail_server.com");
    mailman.put_SmtpUsername("myUsername");
    mailman.put_SmtpPassword("myPassword");
    mailman.put_SmtpPort(465);
    mailman.put_SmtpSsl(true);

    // Create a new email object
    CkEmail email = new CkEmail();

    email.put_Subject("This is a test");
    email.put_Body("This is a test");
    email.put_From("Joe <joe@example.com>");
    boolean success = email.AddTo("Mary","mary@example2.com");

    // Specify a single reply-to address, which will get replace with a list of addresses..
    email.put_ReplyTo("placeholder@example.com");

    // Get the email as MIME.
    CkStringBuilder sbMime = new CkStringBuilder();
    mailman.RenderToMimeSb(email,sbMime);

    // Update the Reply-To MIME header with a list of email addresses.
    String replyToAddrs = "joe@example.com, mike@example.com";
    sbMime.ReplaceAllBetween("Reply-To: ","\r\n",replyToAddrs,false);

    // Examine the MIME to be sent:
    System.out.println(sbMime.getAsString());

    // Here's the MIME:

    // MIME-Version: 1.0
    // Date: Tue, 03 Sep 2024 08:18:12 -0500
    // Message-ID: <D892B0E563A7A13B1F499530DE21529714EA479A@SLICE>
    // Content-Type: text/plain; charset=us-ascii; format=flowed
    // Content-Transfer-Encoding: 7bit
    // X-Priority: 3 (Normal)
    // Subject: This is a test
    // From: Joe <joe@example.com>
    // To: Mary <mary@example2.com>
    // Reply-To: joe@example.com, mike@example.com
    // 
    // This is a test

    // ---------
    // Send the MIME...
    success = mailman.SendMime("joe@example.com","mary@example2.com",sbMime.getAsString());
    if (success == false) {
        System.out.println(mailman.lastErrorText());
        return;
        }

    success = mailman.CloseSmtpConnection();
    if (success == false) {
        System.out.println("Connection to SMTP server not closed cleanly.");
        }

    System.out.println("Mail Sent!");
  }
}