PowerBuilder

Delete a Set of POP3 Messages by UIDL

Demonstrates the Chilkat MailMan.DeleteUidlSet method, which marks the POP3 messages whose UIDLs are listed in a StringTable for deletion. Chilkat processes the UIDL set and sends a DELE command for each located message. This example deletes two messages by UIDL.

Background: When you already know exactly which messages to remove — by their stable UIDLs — DeleteUidlSet deletes them all in one call without first downloading them. It is the efficient counterpart to fetching-then-deleting: for example, after processing messages elsewhere, hand back just their UIDLs to clear them. The deletions are committed when the POP3 session ends (unless ImmediateDelete is set).

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integer li_rc
integer li_Success
oleobject loo_Mailman
oleobject loo_Uidls

li_Success = 0

//  Demonstrates the MailMan.DeleteUidlSet method, which marks the POP3 messages whose UIDLs
//  are listed in a StringTable for deletion.  Chilkat sends DELE for each located message.

loo_Mailman = create oleobject
li_rc = loo_Mailman.ConnectToNewObject("Chilkat.MailMan")
if li_rc < 0 then
    destroy loo_Mailman
    MessageBox("Error","Connecting to COM object failed")
    return
end if

//  Configure the POP3 server connection.
loo_Mailman.MailHost = "pop.example.com"
loo_Mailman.MailPort = 995
loo_Mailman.PopSsl = 1
loo_Mailman.PopUsername = "user@example.com"
loo_Mailman.PopPassword = "myPassword"

//  Build the set of UIDLs to delete.
loo_Uidls = create oleobject
li_rc = loo_Uidls.ConnectToNewObject("Chilkat.StringTable")

loo_Uidls.Append("0000000123abcdef")
loo_Uidls.Append("0000000124abcdef")

//  Mark the messages for deletion.

li_Success = loo_Mailman.DeleteUidlSet(loo_Uidls)
if li_Success = 0 then
    Write-Debug loo_Mailman.LastErrorText
    destroy loo_Mailman
    destroy loo_Uidls
    return
end if

//  Unless the ImmediateDelete property is set to 1, the messages are only marked for
//  deletion.  End the POP3 session (which sends the QUIT command) to commit the deletions.
li_Success = loo_Mailman.Pop3EndSession()
if li_Success = 0 then
    Write-Debug loo_Mailman.LastErrorText
    destroy loo_Mailman
    destroy loo_Uidls
    return
end if

Write-Debug "Deleted the UIDL set from the POP3 server."

//  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.


destroy loo_Mailman
destroy loo_Uidls