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Download the Full Version of a Partial Email

Demonstrates the Chilkat MailMan.FetchFull method, which downloads the complete version of a header-only or partial Email and stores it in a second Email. The full result includes the complete body and any attachments, and the partial email must retain its UIDL. This example previews message 1 (headers only) and then downloads it in full.

Background: A common pattern is to download headers first — cheap and fast — show the user a message list, and only pull the full content when a message is actually opened. FetchFull completes that "download on demand" flow: given a partial email (which carries its UIDL), it fetches the rest from the server. This keeps bandwidth and latency low when browsing a large mailbox.

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Local $bSuccess = False

;  Demonstrates the MailMan.FetchFull method, which downloads the complete version of a
;  header-only or partial Email and stores it in a second Email.  The full result includes
;  the complete body and any attachments.  The partial email must retain its UIDL.

$oMailman = ObjCreate("Chilkat.MailMan")

;  Configure the POP3 server connection.
$oMailman.MailHost = "pop.example.com"
$oMailman.MailPort = 995
$oMailman.PopSsl = True
$oMailman.PopUsername = "user@example.com"
$oMailman.PopPassword = "myPassword"

;  First fetch message 1 as headers only (a fast preview).  headerOnly=True.
$oPartialEmail = ObjCreate("Chilkat.Email")

$bSuccess = $oMailman.FetchOne(True,0,1,$oPartialEmail)
If ($bSuccess = False) Then
    ConsoleWrite($oMailman.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Preview subject: " & $oPartialEmail.Subject & @CRLF)

;  Now download the complete message (body and attachments).
$oFullEmail = ObjCreate("Chilkat.Email")
$bSuccess = $oMailman.FetchFull($oPartialEmail,$oFullEmail)
If ($bSuccess = False) Then
    ConsoleWrite($oMailman.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Full email NumAttachments: " & $oFullEmail.NumAttachments & @CRLF)

;  Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
;  connects and authenticates -- using the property settings above -- whenever a server
;  operation requires it.  Calling the explicit connect/authenticate methods can still be
;  helpful to determine whether a failure occurs while connecting or while authenticating.