Get the Total Size of an IMAP Message

See more IMAP Examples

Demonstrates the Chilkat Imap.GetMailSize method, which returns the complete server-reported size of a message in bytes, including attachment data. The only argument is the Email. This example fetches only the headers and prints the full message size.

Background: The server reports each message's total size, so this value is available even when only the headers were downloaded. That lets a client show a size column in a message list, sort by size, or warn the user before downloading an unusually large message — all without fetching the full body first.

Chilkat Go Downloads

Download Chilkat for Go

    success := false

    //  Demonstrates the Imap.GetMailSize method, which returns the complete server-reported size
    //  of a message in bytes, including attachments.  The only argument is the Email.

    imap := chilkat.NewImap()

    imap.SetSsl(true)
    imap.SetPort(993)

    success = imap.Connect("imap.example.com")
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    success = imap.Login("user@example.com","myPassword")
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    success = imap.SelectMailbox("Inbox")
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    //  Fetch only the message headers.  Attachment bodies are NOT downloaded, but the ckx-imap-*
    //  metadata describing the attachments is present, so the attachment info methods still work.
    headersOnly := true
    useUid := false
    seqNum := 1
    email := chilkat.NewEmail()
    success = imap.FetchEmail(headersOnly,seqNum,useUid,email)
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        email.DisposeEmail()
        return
    }

    sizeBytes := imap.GetMailSize(email)
    fmt.Println("Total message size: ", sizeBytes, " bytes")

    success = imap.Disconnect()
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        email.DisposeEmail()
        return
    }


    imap.DisposeImap()
    email.DisposeEmail()