VBScript

Get the Total Size of an IMAP Message

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.

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VBScript

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

'  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.

set imap = CreateObject("Chilkat.Imap")

imap.Ssl = 1
imap.Port = 993

success = imap.Connect("imap.example.com")
If (success = 0) Then
    outFile.WriteLine(imap.LastErrorText)
    WScript.Quit
End If

success = imap.Login("user@example.com","myPassword")
If (success = 0) Then
    outFile.WriteLine(imap.LastErrorText)
    WScript.Quit
End If

success = imap.SelectMailbox("Inbox")
If (success = 0) Then
    outFile.WriteLine(imap.LastErrorText)
    WScript.Quit
End If

'  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 = 1
useUid = 0
seqNum = 1
set email = CreateObject("Chilkat.Email")
success = imap.FetchEmail(headersOnly,seqNum,useUid,email)
If (success = 0) Then
    outFile.WriteLine(imap.LastErrorText)
    WScript.Quit
End If

sizeBytes = imap.GetMailSize(email)
outFile.WriteLine("Total message size: " & sizeBytes & " bytes")

success = imap.Disconnect()
If (success = 0) Then
    outFile.WriteLine(imap.LastErrorText)
    WScript.Quit
End If


outFile.Close