VB.NET

Delete a POP3 Message by UIDL

Demonstrates the Chilkat MailMan.DeleteByUidl method, which marks the POP3 message identified by a UIDL for deletion. UIDLs are preferred over message numbers because they remain stable across sessions while the message stays in the mailbox. This example marks a message for deletion by its UIDL.

Background: Because a UIDL uniquely and persistently identifies a message, deleting by UIDL is the reliable way to remove exactly the message you intend — even if the mailbox changed since you last looked. As with all POP3 deletion, the message is only marked during the session and is actually removed when the session ends normally (the QUIT command).

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Dim success As Boolean = False

'  Demonstrates the MailMan.DeleteByUidl method, which marks the POP3 message identified by
'  a UIDL for deletion.  UIDLs are preferred over message numbers because they remain stable
'  across sessions while the message remains in the mailbox.

Dim mailman As New Chilkat.MailMan

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

'  Mark a specific message for deletion by its UIDL.

success = mailman.DeleteByUidl("0000000123abcdef")
If (success = False) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


'  Unless the ImmediateDelete property is set to True, the message is only marked for
'  deletion.  End the POP3 session (which sends the QUIT command) to commit the deletion
'  on the server.
success = mailman.Pop3EndSession()
If (success = False) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Deleted the message 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.