DataFlex

Delete a POP3 Message by Message Number

Demonstrates the Chilkat MailMan.DeleteByMsgnum method, which marks an email for deletion by its POP3 message number. Message numbers are specific to a single POP3 session and can change from one session to the next, so UIDLs are generally preferred for stable identification. This example marks message number 1 for deletion.

Background: In POP3, deletion is two-phase: messages are marked with the DELE command during the session, and the server only actually removes them when the session ends cleanly with QUIT. Message numbers are simple sequence positions (1, 2, 3, …) valid only within the current session — which is why DeleteByUidl is safer when you need to reliably target a specific message.

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Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoMailman
    String sTemp1

    Move False To iSuccess

    //  Demonstrates the MailMan.DeleteByMsgnum method, which marks an email for deletion by its
    //  POP3 message number.  Message numbers are specific to a single POP3 session and can
    //  change between sessions, so UIDLs are generally preferred.

    Get Create (RefClass(cComChilkatMailMan)) To hoMailman
    If (Not(IsComObjectCreated(hoMailman))) Begin
        Send CreateComObject of hoMailman
    End

    //  Configure the POP3 server connection.
    Set ComMailHost Of hoMailman To "pop.example.com"
    Set ComMailPort Of hoMailman To 995
    Set ComPopSsl Of hoMailman To True
    Set ComPopUsername Of hoMailman To "user@example.com"
    Set ComPopPassword Of hoMailman To "myPassword"

    //  Mark message number 1 for deletion.

    Get ComDeleteByMsgnum Of hoMailman 1 To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoMailman To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  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.
    Get ComPop3EndSession Of hoMailman To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoMailman To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln "Deleted message 1 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.


End_Procedure