(Go) Mark IMAP Email as Read/Unread (Seen/Unseen)

Demonstrates how to mark emails as read or unread.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    imap := chilkat.NewImap()

    // Connect to an IMAP server.
    // Use TLS
    imap.SetSsl(true)
    imap.SetPort(993)
    success := imap.Connect("imap.someMailServer.com")
    if success != true {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // Login
    success = imap.Login("myLogin","myPassword")
    if success != true {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox")
    if success != true {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // Set PeekMode so that downloaded messages are not
    // automatically marked as seen.
    imap.SetPeekMode(true)

    // The NumMessages property contains the number of messages 
    // in the currently selected mailbox.
    numMsgs := imap.NumMessages()
    if numMsgs == 0 {
        imap.DisposeImap()
        return
    }

    var i int
    for i = 1; i <= numMsgs; i++ {
        // Download each email by sequence number (not UID)
        // email is a Email
        email := imap.FetchSingle(i,false)
        if imap.LastMethodSuccess() == false {
            fmt.Println(imap.LastErrorText())
            imap.DisposeImap()
            return
        }

        // If desired, mark the email as SEEN.  There are two
        // ways to do it:

        // 1) Set the flag directly by using the sequence number
        // Indicate that we are passing a sequence number and
        // not a UID:
        bIsUid := false
        // Set the SEEN flag = 1 to mark the email as SEEN,
        // or set it to 0 to mark it as not-seen.
        success = imap.SetFlag(i,bIsUid,"SEEN",1)
        if success != true {
            fmt.Println(imap.LastErrorText())
            imap.DisposeImap()
            return
        }

        // 2) Alternatively, we can use the email object.
        // When an email is downloaded from the IMAP server
        // Chilkat will add a "ckx-imap-uid" header to the email.
        // This makes it possible to know the UID associated with
        // the email.  (This is not the sequence number, which may change
        // from session to session, but the UID which does not change.
        // The SetMailFlag method is identical to SetFlag, except
        // it gets the UID from the ckx-imap-uid header.
        // For example:
        success = imap.SetMailFlag(email,"SEEN",1)
        if success != true {
            fmt.Println(imap.LastErrorText())
            imap.DisposeImap()
            return
        }

        email.DisposeEmail()

    }

    // Disconnect from the IMAP server.
    success = imap.Disconnect()

    imap.DisposeImap()