(Swift 3,4,5...) 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 Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    let mailman = CkoMailMan()!

    mailman.smtpHost = "smtp.my_mail_server.com"
    mailman.smtpUsername = "myUsername"
    mailman.smtpPassword = "myPassword"
    mailman.smtpPort = 465
    mailman.smtpSsl = true

    // Create a new email object
    let email = CkoEmail()!

    email.subject = "This is a test"
    email.body = "This is a test"
    email.from = "Joe <joe@example.com>"
    var success: Bool = email.add(to: "Mary", emailAddress: "mary@example2.com")

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

    // Get the email as MIME.
    let sbMime = CkoStringBuilder()!
    mailman.render(toMimeSb: email, renderedMime: sbMime)

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

    // Examine the MIME to be sent:
    print("\(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", recipients: "mary@example2.com", mimeMsg: sbMime.getAsString())
    if success == false {
        print("\(mailman.lastErrorText!)")
        return
    }

    success = mailman.closeSmtpConnection()
    if success == false {
        print("Connection to SMTP server not closed cleanly.")
    }

    print("Mail Sent!")

}