(Go) 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 Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    mailman := chilkat.NewMailMan()

    mailman.SetSmtpHost("smtp.my_mail_server.com")
    mailman.SetSmtpUsername("myUsername")
    mailman.SetSmtpPassword("myPassword")
    mailman.SetSmtpPort(465)
    mailman.SetSmtpSsl(true)

    // Create a new email object
    email := chilkat.NewEmail()

    email.SetSubject("This is a test")
    email.SetBody("This is a test")
    email.SetFrom("Joe <joe@example.com>")
    success := email.AddTo("Mary","mary@example2.com")

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

    // Get the email as MIME.
    sbMime := chilkat.NewStringBuilder()
    mailman.RenderToMimeSb(email,sbMime)

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

    // Examine the MIME to be sent:
    fmt.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 {
        fmt.Println(mailman.LastErrorText())
        mailman.DisposeMailMan()
        email.DisposeEmail()
        sbMime.DisposeStringBuilder()
        return
    }

    success = mailman.CloseSmtpConnection()
    if success == false {
        fmt.Println("Connection to SMTP server not closed cleanly.")
    }

    fmt.Println("Mail Sent!")

    mailman.DisposeMailMan()
    email.DisposeEmail()
    sbMime.DisposeStringBuilder()